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Link Posted: 1/17/2019 12:10:57 PM EDT
[#1]
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Quoted:

I look forward to seeing what happens with just the gas system being moved. Honestly, it's where I'd start, too... the reciprocating mass velocity may not be the worst problem, short-term, and smoothing out the peak of the gas system should help quite a bit either way.

ETA: I should clarify, I'm not saying the bolt velocity is low, I'm saying it's far above the "ideal" 4m/s.
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Yep I didn't think you were.

Only meant that low velocity is often the result of simply constricting gas flow without regard to timing, dwell, impulse, etc.

To the best of my knowledge, right now, even with the 6 position gas valve, one setting is too low resulting in too little energy to function properly consistently, and the next setting up is too much, resulting in torn rims, etc, because changing the gas flow alone does not account for pressure curves, timing and acceleration to a great enough degree.

When it could very well be that extending dwell time by moving the gas port forward could result in necessitating an even larger gas valve setting than above in order to transfer sufficient energy for the rifle to function, while at the same time resolving extraction issues by extracting under lower chamber pressures and accelerating the bolt carrier at a lower rate.
Link Posted: 1/17/2019 12:11:31 PM EDT
[#2]
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Quoted:

Oh I can't wait to see what you cook up on the MDR...but its just a dang shame you have to...that is all I am saying...this gun wasn't sold or marketed as a DIY fix rifle, or a custom, hand-fit model or anything like that...this craptastic rifle was sold to the masses as a battle rifle...that is why I have such bitterness to DT on this...they failed to deliver on everything but the actual "concept".
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No disagreement here.
Link Posted: 1/17/2019 12:22:56 PM EDT
[#3]
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Quoted:
When it could very well be that extending dwell time by moving the gas port forward could result in necessitating an even larger gas valve setting than above in order to transfer sufficient energy for the rifle to function, while at the same time resolving extraction issues by extracting under lower chamber pressures and accelerating the bolt carrier at a lower rate.
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Could add gas volume between the port and the piston, similar in concept to a fat or pigtail gas tube

Would be a bandaid, but this thing is already wrapped in bandaids.
Link Posted: 1/17/2019 1:33:59 PM EDT
[#4]
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Quoted:

It's far easier for me to move the gas system than to re-engineer everything going on behind the barrel extension.  Removing the gas block, plugging the existing gas port, drilling a new gas port, turning a longer gas plunger - that's it.  I don't care about the silly little section of pic rail and can come up with a way to eliminate any gap in the top rail after the fact, even if it means milling a new gas block with a cantilevered rail section.

We probably disagree more on what exactly the problem and solution is than anything.  I'm convinced my particular rifle's problem isn't reciprocating velocity, but acceleration and timing of that acceleration.  Lower the rate of acceleration and delay the unlocking of the bolt until a lower chamber pressure is present than currently, and I believe mine would run quite well.

ETA - note I've never, not once, had a malfunction related to low carrier velocity or inertia.  Not failure to feed, not failure to LRBHO, not failure to eject, not failure to go into battery.  Maybe if I can get it slowed down I will, but to date my failures are all related to ripping rims and leaving cases in the chamber.
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The barrel contour tapers down in front of the gas block. How are you planning to get around that?
Link Posted: 1/17/2019 1:43:07 PM EDT
[#5]
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Quoted:

The barrel contour tapers down in front of the gas block. How are you planning to get around that?
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Turn a flat, shrink or braze a sleeve... there are plenty of solutions, none of which are technically difficult.
Link Posted: 1/17/2019 3:13:19 PM EDT
[#6]
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Quoted:

Could add gas volume between the port and the piston, similar in concept to a fat or pigtail gas tube

Would be a bandaid, but this thing is already wrapped in bandaids.
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That's my first step in diagnosis.  Making a gas plug with extra volume to act as an expansion chamber.
Link Posted: 1/17/2019 3:14:14 PM EDT
[#7]
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Quoted:

Turn a flat, shrink or braze a sleeve... there are plenty of solutions, none of which are technically difficult.
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Yep.  Shrinking a sleeve will be my most likely approach offhand.
Link Posted: 1/17/2019 3:44:21 PM EDT
[#8]
If you have LN around, go whole hog and aim for 0.002 interference.

Overkill, but not enough to deform the bore or introduce enough stress to crack... well, as long as the sleeve isn't too thin. Sounds like you know what you're doing already.
Link Posted: 1/17/2019 3:50:39 PM EDT
[#9]
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So best case, their testers were ignorant enough to not test with a variety of ammo, which 99.99% of their customers would actually use.
Worst case, they got too far along before someone caught it and said "too late now" and hoped nobody would notice before they started getting a return on their investment.
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(I don't believe they knowingly put such a badly flawed system out; I do think they cheaped out on tearing by using in-house ammo)
So best case, their testers were ignorant enough to not test with a variety of ammo, which 99.99% of their customers would actually use.
Worst case, they got too far along before someone caught it and said "too late now" and hoped nobody would notice before they started getting a return on their investment.
Hey, I'm still saying "mistakes were made," I'm just laying out how it probably wasn't malicious or due to *gross* incompetence.  Machining parts is hard enough; designing *mechanisms* is a whole other layer of BS, with a lot of near-super science required to make stuff work together correctly off the bat.  It's a totally different mindset when you add that next magnitude of complexity.  GD&T and a TON of go/no-go assembly gauges are needed, and most engineers that don't do moving-parts stuff or only simple assemblies haven't even heard of those things.  You really need automotive or power-plant design guys on board to even approach this sort of job right (since an autoloader firearm is basically a combustion engine), and even then, it'd be like mass-producing an engine where things like cylinders & rings can't be honed or worn-in to each-other, but have to work flawlessly out of the gate, across the entire production line, every part swappable with every other part without impacting function.  It's a nightmare no matter how you look at it, and it's why practically no firearm designs work perfectly in the initial batch (and why any degradation in their process quickly leads to Remington-style garbage guns)

My very brief experience in this area has given me a lot more respect for Hi Point pulling off typically reliable guns at their price point; it's a goddamn miracle.  I still have no idea how Hudson was able to pull of a clean-sheet design with (to my knowledge) no design or production failures of any sort, as their very first project --I assume the bulk of their staff are veteran industry badasses, that's the only explanation.
Link Posted: 1/17/2019 4:00:29 PM EDT
[#10]
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Quoted:
Could add gas volume between the port and the piston, similar in concept to a fat or pigtail gas tube

Would be a bandaid, but this thing is already wrapped in bandaids.
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Quoted:
Quoted:
When it could very well be that extending dwell time by moving the gas port forward could result in necessitating an even larger gas valve setting than above in order to transfer sufficient energy for the rifle to function, while at the same time resolving extraction issues by extracting under lower chamber pressures and accelerating the bolt carrier at a lower rate.
Could add gas volume between the port and the piston, similar in concept to a fat or pigtail gas tube

Would be a bandaid, but this thing is already wrapped in bandaids.
Do what they did on the Yugo M76 to 'grow' the gas system but keep the overall package much shorter than a PSL despite being in 8mm Mauser;

-Make the piston head long enough to go past the gas port when in battery
-Drill a hole in the side of the piston (at a turbulence groove) so it aligns with the port when in battery
-Drill a hole in the front of the piston that intersects the side-hole

Gas flows through the side of the piston out the front through a longer semi-tortuous path (dropping its pressure, effectively lengthening the path even more) where it fills up the gas cup, and drives the piston rearward.  Shortly after the piston moves, the turbulence ring misaligns to the gas port, shutting off additional gas flow (by this point the piston already has enough pressurized gas in front of & inside it to complete the necessary acceleration).  The result is a short, quasi-self-adjusting gas system.  Oh, the M76 also has a blow-off port in the front of the gas cup, which essentially 'damps' out gas cup pressure spikes as well.  Lastly, the gas cup itself is adjustable rather like the MDR, with different size orifices that can be placed between the piston and the port in the gas block.  If you put a tit on the end of the piston that initially blocked the blow-off port sort of like the G36, you'd have one of the most sophisticated self-regulating gas piston systems possible.
Link Posted: 1/17/2019 4:03:09 PM EDT
[#11]
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Quoted:
If you have LN around, go whole hog and aim for 0.002 interference.

Overkill, but not enough to deform the bore or introduce enough stress to crack... well, as long as the sleeve isn't too thin. Sounds like you know what you're doing already.
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I do, actually.  So that's possible.  I have a 10L dewar full for heat treating.
Link Posted: 1/17/2019 4:05:00 PM EDT
[#12]
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Quoted:

Do what they did on the Yugo M76 to 'grow' the gas system but keep the overall package much shorter than a PSL despite being in 8mm Mauser;

-Make the piston head long enough to go past the gas port when in battery
-Drill a hole in the side of the piston (at a turbulence groove) so it aligns with the port when in battery
-Drill a hole in the front of the piston that intersects the side-hole

Gas flows through the side of the piston out the front through a longer semi-tortuous path (dropping its pressure, effectively lengthening the path even more) where it fills up the gas cup, and drives the piston rearward.  Shortly after the piston moves, the turbulence ring misaligns to the gas port, shutting off additional gas flow (by this point the piston already has enough pressurized gas in front of & inside it to complete the necessary acceleration).  The result is a short, quasi-self-adjusting gas system.  Oh, the M76 also has a blow-off port in the front of the gas cup, which essentially 'damps' out gas cup pressure spikes as well.  Lastly, the gas cup itself is adjustable rather like the MDR, with different size orifices that can be placed between the piston and the port in the gas block.  If you put a tit on the end of the piston that initially blocked the blow-off port sort of like the G36, you'd have one of the most sophisticated self-regulating gas piston systems possible.
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That's actually pretty ingenious.
Link Posted: 1/17/2019 4:17:11 PM EDT
[#13]
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Quoted:
That's actually pretty ingenious.
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Discussion ForumsJump to Quoted PostQuote History
Quoted:
Quoted:

Do what they did on the Yugo M76 to 'grow' the gas system but keep the overall package much shorter than a PSL despite being in 8mm Mauser;

-Make the piston head long enough to go past the gas port when in battery
-Drill a hole in the side of the piston (at a turbulence groove) so it aligns with the port when in battery
-Drill a hole in the front of the piston that intersects the side-hole

Gas flows through the side of the piston out the front through a longer semi-tortuous path (dropping its pressure, effectively lengthening the path even more) where it fills up the gas cup, and drives the piston rearward.  Shortly after the piston moves, the turbulence ring misaligns to the gas port, shutting off additional gas flow (by this point the piston already has enough pressurized gas in front of & inside it to complete the necessary acceleration).  The result is a short, quasi-self-adjusting gas system.  Oh, the M76 also has a blow-off port in the front of the gas cup, which essentially 'damps' out gas cup pressure spikes as well.  Lastly, the gas cup itself is adjustable rather like the MDR, with different size orifices that can be placed between the piston and the port in the gas block.  If you put a tit on the end of the piston that initially blocked the blow-off port sort of like the G36, you'd have one of the most sophisticated self-regulating gas piston systems possible.
That's actually pretty ingenious.
The system is what's in their newer M21 hybrid AK/Galil things (they have an ambi selector & the gas system, but otherwise basically an M70 with new furniture)
Link Posted: 1/17/2019 4:21:07 PM EDT
[#14]
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Quoted:
That's actually pretty ingenious.
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Quoted:
Quoted:

Do what they did on the Yugo M76 to 'grow' the gas system but keep the overall package much shorter than a PSL despite being in 8mm Mauser;

-Make the piston head long enough to go past the gas port when in battery
-Drill a hole in the side of the piston (at a turbulence groove) so it aligns with the port when in battery
-Drill a hole in the front of the piston that intersects the side-hole

Gas flows through the side of the piston out the front through a longer semi-tortuous path (dropping its pressure, effectively lengthening the path even more) where it fills up the gas cup, and drives the piston rearward.  Shortly after the piston moves, the turbulence ring misaligns to the gas port, shutting off additional gas flow (by this point the piston already has enough pressurized gas in front of & inside it to complete the necessary acceleration).  The result is a short, quasi-self-adjusting gas system.  Oh, the M76 also has a blow-off port in the front of the gas cup, which essentially 'damps' out gas cup pressure spikes as well.  Lastly, the gas cup itself is adjustable rather like the MDR, with different size orifices that can be placed between the piston and the port in the gas block.  If you put a tit on the end of the piston that initially blocked the blow-off port sort of like the G36, you'd have one of the most sophisticated self-regulating gas piston systems possible.
That's actually pretty ingenious.
that actually is pretty goddamn smart.
Link Posted: 1/17/2019 4:26:21 PM EDT
[#15]
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Quoted:
that actually is pretty goddamn smart.
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Quoted:
Quoted:
Quoted:

Do what they did on the Yugo M76 to 'grow' the gas system but keep the overall package much shorter than a PSL despite being in 8mm Mauser;

-Make the piston head long enough to go past the gas port when in battery
-Drill a hole in the side of the piston (at a turbulence groove) so it aligns with the port when in battery
-Drill a hole in the front of the piston that intersects the side-hole

Gas flows through the side of the piston out the front through a longer semi-tortuous path (dropping its pressure, effectively lengthening the path even more) where it fills up the gas cup, and drives the piston rearward.  Shortly after the piston moves, the turbulence ring misaligns to the gas port, shutting off additional gas flow (by this point the piston already has enough pressurized gas in front of & inside it to complete the necessary acceleration).  The result is a short, quasi-self-adjusting gas system.  Oh, the M76 also has a blow-off port in the front of the gas cup, which essentially 'damps' out gas cup pressure spikes as well.  Lastly, the gas cup itself is adjustable rather like the MDR, with different size orifices that can be placed between the piston and the port in the gas block.  If you put a tit on the end of the piston that initially blocked the blow-off port sort of like the G36, you'd have one of the most sophisticated self-regulating gas piston systems possible.
That's actually pretty ingenious.
that actually is pretty goddamn smart.
It's actually really goddamn confusing & frustrating when building an M76 if you don't realize that's what's going on

"I've measured this five times; the gas port & block need to be 1/2" further out for this piston length, but the barrel journal's all wrong and the gas tube is loose.  WHATTHEHELLISGOINGONEHERE?!!"

It doesn't help that I was using an ORF 'receiver' (to use the term loosely) that had a half dozen gremlins of its own I was also chasing.
Link Posted: 1/17/2019 4:29:33 PM EDT
[#16]
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Quoted:
Do what they did on the Yugo M76 to 'grow' the gas system but keep the overall package much shorter than a PSL despite being in 8mm Mauser;

-Make the piston head long enough to go past the gas port when in battery
-Drill a hole in the side of the piston (at a turbulence groove) so it aligns with the port when in battery
-Drill a hole in the front of the piston that intersects the side-hole

Gas flows through the side of the piston out the front through a longer semi-tortuous path (dropping its pressure, effectively lengthening the path even more) where it fills up the gas cup, and drives the piston rearward.  Shortly after the piston moves, the turbulence ring misaligns to the gas port, shutting off additional gas flow (by this point the piston already has enough pressurized gas in front of & inside it to complete the necessary acceleration).  The result is a short, quasi-self-adjusting gas system.  Oh, the M76 also has a blow-off port in the front of the gas cup, which essentially 'damps' out gas cup pressure spikes as well.  Lastly, the gas cup itself is adjustable rather like the MDR, with different size orifices that can be placed between the piston and the port in the gas block.  If you put a tit on the end of the piston that initially blocked the blow-off port sort of like the G36, you'd have one of the most sophisticated self-regulating gas piston systems possible.
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Or copy the RFB gas system, it's not much different than what you describe.

Size of the flat on the piston stem determines how much gas enters the gas block.
Front of gas cup has tapered adjustable gas head to control how much is vented, lots of adjustment.
The rest goes into the piston chamber and drives it rearward.

Not much difference in gen1 and gen2, functionally.

Link Posted: 1/17/2019 4:30:36 PM EDT
[#17]
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Quoted:
Or copy the RFB gas system, it's not much different than what you describe.
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Quoted:
Quoted:
Do what they did on the Yugo M76 to 'grow' the gas system but keep the overall package much shorter than a PSL despite being in 8mm Mauser;

-Make the piston head long enough to go past the gas port when in battery
-Drill a hole in the side of the piston (at a turbulence groove) so it aligns with the port when in battery
-Drill a hole in the front of the piston that intersects the side-hole

Gas flows through the side of the piston out the front through a longer semi-tortuous path (dropping its pressure, effectively lengthening the path even more) where it fills up the gas cup, and drives the piston rearward.  Shortly after the piston moves, the turbulence ring misaligns to the gas port, shutting off additional gas flow (by this point the piston already has enough pressurized gas in front of & inside it to complete the necessary acceleration).  The result is a short, quasi-self-adjusting gas system.  Oh, the M76 also has a blow-off port in the front of the gas cup, which essentially 'damps' out gas cup pressure spikes as well.  Lastly, the gas cup itself is adjustable rather like the MDR, with different size orifices that can be placed between the piston and the port in the gas block.  If you put a tit on the end of the piston that initially blocked the blow-off port sort of like the G36, you'd have one of the most sophisticated self-regulating gas piston systems possible.
Or copy the RFB gas system, it's not much different than what you describe.
Huh, I didn't know that; I figured it would be similar to my RDB...then again, IIRC the RFB had gas block issues early on, so maybe that was the fix?
Link Posted: 1/17/2019 4:35:44 PM EDT
[#18]
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Huh, I didn't know that; I figured it would be similar to my RDB...then again, IIRC the RFB had gas block issues early on, so maybe that was the fix?
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Think some gen1's had issues getting beat up when overgassed, such as running a suppressor if you didn't pull the gas adjuster off.
Mine has been running like a top since day 1 with the gen1 gas system, I've got a sub-500 SN.

If you compare the RFB and MDR barrels, you'll notice the gas block on the RFB is at least a couple inches further from the chamber.

The RFB also has a pretty beefy reciprocating mass compared to the MDR, and still manages to be a few ounces lighter overall...
Link Posted: 1/17/2019 4:51:39 PM EDT
[#19]
The bad thing with the RFB is it's LOUD suppressed. To me it was in the realm of why even put a suppressor on it if the gas system is going to vent that much so I sold it. I don't want the mdr to be like that.
Link Posted: 1/17/2019 4:55:15 PM EDT
[#20]
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The bad thing with the RFB is it's LOUD suppressed. To me it was in the realm of why even put a suppressor on it if the gas system is going to vent that much so I sold it. I don't want the mdr to be like that.
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Wonder how the RFB is with an OSS?

The new gen RFBs are good to go aren’t they?
Link Posted: 1/17/2019 4:59:36 PM EDT
[#21]
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Quoted:
The bad thing with the RFB is it's LOUD suppressed. To me it was in the realm of why even put a suppressor on it if the gas system is going to vent that much so I sold it. I don't want the mdr to be like that.
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Gen 1 or gen 2?

If Gen 2, they offer a suppressor-specific piston that reduces the gas entering the gas cup (no flat on the side of the piston stem) so you can leave the gas vent cap on.

I've been toying with the idea of making up a couple test pistons for my Gen1 with smaller flats, or two flats, for a quick 120deg flip to go from unsuppressed to supppressed.

I bet off to the side, you wouldn't notice much difference from an AR10, but as the shooter, well, there is a bomb going off and a lot of moving metal under your cheek bone.
Link Posted: 1/17/2019 5:15:22 PM EDT
[#22]
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Quoted:

Gen 1 or gen 2?

If Gen 2, they offer a suppressor-specific piston that reduces the gas entering the gas cup (no flat on the side of the piston stem) so you can leave the gas vent cap on.

I've been toying with the idea of making up a couple test pistons for my Gen1 with smaller flats, or two flats, for a quick 120deg flip to go from unsuppressed to supppressed.

I bet off to the side, you wouldn't notice much difference from an AR10, but as the shooter, well, there is a bomb going off and a lot of moving metal under your cheek bone.
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Mine was a gen 1. I remember trying to contact keltec about updating it but never got any calls or emails back. They're slightly worse than DT in that regard.
Link Posted: 1/17/2019 6:07:49 PM EDT
[#23]
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Quoted:
Wonder how the RFB is with an OSS?

The new gen RFBs are good to go aren’t they?
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Quoted:
Quoted:
The bad thing with the RFB is it's LOUD suppressed. To me it was in the realm of why even put a suppressor on it if the gas system is going to vent that much so I sold it. I don't want the mdr to be like that.
Wonder how the RFB is with an OSS?

The new gen RFBs are good to go aren’t they?
It'll be even louder, most likely.  Low-backpressure cans are a compromise between noise reduction & breaking the gun.  Now, cycling the gun too fast also makes a lot of noise ('port pop' at the chamber from residual pressure as well as parts clanging together), but a free-er breathing can will necessarily send more fast moving air (noise) down range.

A bleed-off port that vents into the end cap of the can is the best solution --I think someone did this for AUGs at one time-- but obviously makes mount the can more difficult & proprietary.

Maybe a second, tiny silencer mounted at the gas block?
Link Posted: 1/17/2019 6:15:26 PM EDT
[#24]
I think a company made some baffled gas caps for the gen 1 rfbs.
Link Posted: 1/17/2019 8:02:39 PM EDT
[#25]
How awesome would it be if Kel-Tec offered an MDR trade-up program.  Send in an MDR, get back an RFB *and* an RDB... I mean the MSRP works out about the same
Link Posted: 1/18/2019 12:51:58 AM EDT
[#26]
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How awesome would it be if Kel-Tec offered an MDR trade-up program.  Send in an MDR, get back an RFB *and* an RDB... I mean the MSRP works out about the same
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What would they do with the MDRs, though?
Link Posted: 1/18/2019 12:56:36 AM EDT
[#27]
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Quoted:

What would they do with the MDRs, though?
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Artificial reef?
Link Posted: 1/18/2019 2:56:03 AM EDT
[#28]
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Quoted:

What would they do with the MDRs, though?
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They could probably fix them
Link Posted: 1/18/2019 2:57:02 PM EDT
[#29]
First report of the 5.56 MDR is on BPF...well an unboxing kind of sort of...the charging handles don't work as they should...and the flash hiders are still monkeyed on where it breaks removal tools...who knew...I guess DT never learns from their mistakes like they say they do...same o craptastic quality that makes it into customers' hands.
Link Posted: 1/18/2019 3:29:21 PM EDT
[#30]
"Delphi Tech - The Customer IS the QA!"
Link Posted: 1/18/2019 3:30:36 PM EDT
[#31]
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Quoted:
First report of the 5.56 MDR is on BPF...well an unboxing kind of sort of...the charging handles don't work as they should...and the flash hiders are still monkeyed on where it breaks removal tools...who knew...I guess DT never learns from their mistakes like they say they do...same o craptastic quality that makes it into customers' hands.
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It's too pathetic to be anything but hilarious, now.
Link Posted: 1/18/2019 3:53:29 PM EDT
[#32]
Can't wait to see them at Range Day at SHOT. I'm sure it will be all good news propaganda from them. Hopefully they'll have a .223 to shoot that I can film guys doing malfunction drills with.
Link Posted: 1/18/2019 3:58:48 PM EDT
[#33]
They will just set the gas all the way up to make sure they all fire...
Link Posted: 1/18/2019 4:03:40 PM EDT
[#34]
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Quoted:
They will just set the gas all the way up to make sure they all fire...
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Guess that's why last year's videos looked like they kicked dang hard.
Link Posted: 1/18/2019 8:11:23 PM EDT
[#35]
Just look at how the MDR recoils in InRange's video on Setting 5 and 6...its ridiculousness...the new normal setting in 2019 is the old Setting 6 (adverse)...

Link Posted: 1/18/2019 10:10:37 PM EDT
[#36]
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Quoted:
Guess that's why last year's videos looked like they kicked dang hard.
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They will just set the gas all the way up to make sure they all fire...
Guess that's why last year's videos looked like they kicked dang hard.
I think they’ve been doing this awhile. I remember a long while back when they were first being put out, people shooting them at events complained about their recoil. Everyone shooting them looked like they were shooting a shotgun. It makes sense now, if they just had them running wide open.
Link Posted: 1/18/2019 10:59:00 PM EDT
[#37]
Is the Tavor 7 still slated for 1st quarter this year?

If so, the fat lady will have begun her Aria.

The 7 is plenty accurate, having no reliability issues with any brass cased ammo ( I don't know about steel at this time ), and has improvements on a few things over the Tavor / X95, one being all you need for swapping righty to lefty is to flip the ejection port / shell deflector over ( so to speak ), just takes a few seconds, no tools, No need to remove the bolt and put in opposite way or anything like that, you don't need to open the internals at all. It uses SR25 mags so nothing proprietary, weighs 9lbs.
Link Posted: 1/18/2019 11:57:44 PM EDT
[#38]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Is the Tavor 7 still slated for 1st quarter this year?

If so, the fat lady will have begun her Aria.

The 7 is plenty accurate, having no reliability issues with any brass cased ammo ( I don't know about steel at this time ), and has improvements on a few things over the Tavor / X95, one being all you need for swapping righty to lefty is to flip the ejection port / shell deflector over ( so to speak ), just takes a few seconds, no tools, No need to remove the bolt and put in opposite way or anything like that, you don't need to open the internals at all. It uses SR25 mags so nothing proprietary, weighs 9lbs.
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I’m a big fan of the 7 (at current) but let’s be fair. Has there been any real info out wrt its reliability and accuracy? I know IWI was not happy with releasing it until they claimed it could put out sub-MOA, but I don’t know of any testing of production samples that can vouch for that. I know IWI has a great track record with reliability and I have no reason to think the 7 will not live up to that, but I don’t know of any actual data regarding that either. Am I out of the loop, and did I just miss this? I fully plan to buy the 7 assuming it’s everything it should be, but I must have missed the info above if it’s out there.
Link Posted: 1/19/2019 9:55:26 AM EDT
[#39]
Unfortunately not....IWI has been tight lips about its progress...probably for the better...at least they realized they had a problem...halted the release until it is 100%...
Link Posted: 1/19/2019 10:56:44 AM EDT
[#40]
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Quoted:
Unfortunately not....IWI has been tight lips about its progress...probably for the better...at least they realized they had a problem...halted the release until it is 100%...
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Imagine how much better DT would be sitting, if they'd only stopped promising the moon... IWI seems smart, in that regard.
Link Posted: 1/19/2019 11:19:28 AM EDT
[#41]
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Quoted:

Imagine how much better DT would be sitting, if they'd only stopped promising the moon... IWI seems smart, in that regard.
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I agree...
Link Posted: 1/19/2019 11:27:26 AM EDT
[#42]
Range day at SHOT is Monday, hopefully IWI has a T7 at their station there to shoot, will be going to the DT setup as well if their there. I missed last year, but prior to that they weren't at the range day event, just private events.
Link Posted: 1/19/2019 11:52:17 AM EDT
[#43]
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Quoted:
Range day at SHOT is Monday, hopefully IWI has a T7 at their station there to shoot, will be going to the DT setup as well if their there. I missed last year, but prior to that they weren't at the range day event, just private events.
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I remember them missing those range days, and everyone was ‘wtf’ about it because it made no sense to do so. But you see, DT would have *loved* to show everyone how reliable and smooth their (at the time) new MDR was, but they were too busy “dEmOnStRaTiNg It To .MiL cLiEnTs AnD SuBmItTiNg It To NATO TeStInG”
Link Posted: 1/19/2019 12:00:03 PM EDT
[#44]
Wasn't that demo to the Quick Reaction Camel Force of some middle Eastern kingdom, or did they just license them the bolt action production for that region so they could claim they don't sell product in that region?
Link Posted: 1/19/2019 12:36:45 PM EDT
[#45]
Pakistan's response to DT

Anyways...I wonder if DT will have ejection chutes on the 5.56 rifles at Shot
Link Posted: 1/19/2019 12:39:04 PM EDT
[#46]
Doubt it, maybe a prototype. But at this point all MDR parts can be still considered prototype.
Link Posted: 1/19/2019 12:52:22 PM EDT
[#47]
The most screwed up firearm release in recent memory...
Link Posted: 1/19/2019 1:11:51 PM EDT
[#48]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Wasn't that demo to the Quick Reaction Camel Force of some middle Eastern kingdom, or did they just license them the bolt action production for that region so they could claim they don't sell product in that region?
View Quote
I know that was a thing with their bolt guns (SRS?). I think their offering just wasn’t competitive and they pulled out so they could claim some moral high ground rather than getting rejected. I don’t know who they were demo’ing the MDR for though. I’d wager DT doesn’t know either, as they probably made it up in the first place. For their sake I hope they made it up, I can’t imagine how bad any 3rd party tests would have gone, let alone back then so early in its beta testing.

ETA: didn’t see the above link, which aligns pretty close with what I recalled. They tried to ask out a hot chick, were clearly getting rejected, and beat her to the punch and went all over Facebook to call her fat and ugly first.
Link Posted: 1/19/2019 1:25:28 PM EDT
[#49]
On the contrary, Desert Tech never even made it to the shortlist, though the company had shown interest in securing the deal initially. Desert Tech’s first and foremost ethical responsibility should be honesty. The Company unfortunately clearly violated it by fabricating a story that at best is a publicity stunt.
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Paki slap down.

I read they licensed their bolt action platform to some Euro or ME company to sell it in that region.
Link Posted: 1/19/2019 3:14:34 PM EDT
[#50]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
I know that was a thing with their bolt guns (SRS?). I think their offering just wasn’t competitive and they pulled out so they could claim some moral high ground rather than getting rejected. I don’t know who they were demo’ing the MDR for though. I’d wager DT doesn’t know either, as they probably made it up in the first place. For their sake I hope they made it up, I can’t imagine how bad any 3rd party tests would have gone, let alone back then so early in its beta testing.

ETA: didn’t see the above link, which aligns pretty close with what I recalled. They tried to ask out a hot chick, were clearly getting rejected, and beat her to the punch and went all over Facebook to call her fat and ugly first.
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Quoted:
Wasn't that demo to the Quick Reaction Camel Force of some middle Eastern kingdom, or did they just license them the bolt action production for that region so they could claim they don't sell product in that region?
I know that was a thing with their bolt guns (SRS?). I think their offering just wasn’t competitive and they pulled out so they could claim some moral high ground rather than getting rejected. I don’t know who they were demo’ing the MDR for though. I’d wager DT doesn’t know either, as they probably made it up in the first place. For their sake I hope they made it up, I can’t imagine how bad any 3rd party tests would have gone, let alone back then so early in its beta testing.

ETA: didn’t see the above link, which aligns pretty close with what I recalled. They tried to ask out a hot chick, were clearly getting rejected, and beat her to the punch and went all over Facebook to call her fat and ugly first.
The paki thing is separate from the ME thing.

Pakistan thing DT talked their way into a rifle competition for a contract in Pakistan. Meaning they must have done state department paperwork and such. Then DT started yapping about how they were taking the high road that Pakistan was begging them for rifles but DT wouldn’t sell to them because they were afraid the pakis would give them away and DT rifles would be used against US troops. It didn’t pass the sniff test. Especially since the story started on a gun website DT sponsored then only spread to jingoistic sympathetic news sources that did zero fact checking. Shortly after that Pakistan responded to news outlets basically saying “wtf? DT wasn’t going to win that contract they didn’t refuse us shit.”. Which makes sense a small fry company versus the big dogs of the world armament industry in a country with rampant corruption where kickbacks will probably come into play. So basically they lied out their ass when they realized they weren’t going to win to get free PR.

The ME thing was only a few years ago. They either picked up a distributor in the UAE or allowed I think Caracal to produce their stuff for ME sales. I forget which. But it further proved how full of shit they were on the Pakistan thing as they were allowing their gear to hit third parties that they had no say over in the ME where states in the region do hand over weapons to unsavory characters who absolutely will use them against US troops in the region if given a chance.

Frankly I tend not to believe a damn thing they say about anything anymore.
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