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Posted: 10/18/2014 7:55:18 PM EDT
[#1]
Does the firing pin have movement?
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Posted: 10/18/2014 7:58:53 PM EDT
[#2]
Quote HistoryQuoted: Does the firing pin have movement? ETA: there is no visible firing pin protrusion on the boltface either.
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Posted: 10/18/2014 8:05:38 PM EDT
[#3]
What's the recoil feel like? Is it abusive at all?
Swap over the carrier with all the other components the same. Fire both uppers. |
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Posted: 10/18/2014 8:13:40 PM EDT
[#4]
Quote HistoryQuoted: What's the recoil feel like? Is it abusive at all? |
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Posted: 10/18/2014 8:56:16 PM EDT
[#5]
I agree with trying the other BCG and seeing if the problem persists.
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Posted: 10/18/2014 9:05:10 PM EDT
[#6]
Quote HistoryQuoted: I agree with trying the other BCG and seeing if the problem persists. |
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Posted: 10/18/2014 9:13:43 PM EDT
[#7]
I'm wondering if the rearward movement of the carrier is violent enough to cause the hammer to come off the disconnector. I've seen it before, but not in 5.56 guns. A suppressed DD MK18 is going to be severely overgassed. Try a heavier buffer setup to see if it slows down.
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Posted: 10/18/2014 9:17:20 PM EDT
[#8]
Quote HistoryQuoted:
I'm wondering if the rearward movement of the carrier is violent enough to cause the hammer to come off the disconnector. I've seen it before, but not in 5.56 guns. A suppressed DD MK18 is going to be severely overgassed. Try a heavier buffer setup to see if it slows down. This. |
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Posted: 10/19/2014 10:22:09 AM EDT
[#9]
Just to verify, it's an M16 lower that's in NFA jail, correct? It doesn't make sense for a semi lower to do this with one upper and not another. I'm leaning towards something with the gas system/bcg.
1. Maybe swap out the BCG from the Noveske or another upper that you know doesn't have issues and see if you can replicate it or if it works properly. If it works properly, a new Bolt or complete BCG is in order and Daniel Defense should give you one. If it still fires in burst with a different BCG, maybe gas port or gas tube? 2. What is the burst like? Is it evenly timed like an actual select fire or is it completely random/feels like it is malfunctioning? 3. What setting are you using on the switchblock upper (Normal or Suppressed)? 4. What is your buffer set up? Maybe go with an H2 and a more powerful spring like a Sprinco I certainly wouldn't fire that DD upper as is at a range if it's going rogue and shooting 3 round burst. If the wrong person sees it you can go from the M16 lower being in NFA jail to you being in Federal jail 
Bonus - Pick up a Geissele SSF when you get the lower 
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Posted: 10/19/2014 10:28:32 AM EDT
[#10]
Sounds like bolt bounce to me, as mentioned. The heavier buffer, perhaps a different recoil spring would be the first thing I try.
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Posted: 10/19/2014 10:49:06 AM EDT
[#11]
Quote HistoryQuoted:
Just to verify, it's an M16 lower that's in NFA jail, correct? It doesn't make sense for a semi lower to do this with one upper and not another. I'm leaning towards something with the gas system/bcg. he will be putting it on a RR, but the problem currently lies with it being used an an SBR lower.This problem still only get worse if he tries to run it on auto 1. Maybe swap out the BCG from the Noveske or another upper that you know doesn't have issues and see if you can replicate it or if it works properly. If it works properly, a new Bolt or complete BCG is in order and Daniel Defense should give you one. If it still fires in burst with a different BCG, maybe gas port or gas tube? [He should absolutely try swapping the boot and carrier between the 2, but i have serious doubts that will be the issue. 2. What is the burst like? Is it evenly timed like an actual select fire or is it completely random/feels like it is malfunctioning? Quote HistoryQuoted:
Just to verify, it's an M16 lower that's in NFA jail, correct? It doesn't make sense for a semi lower to do this with one upper and not another. I'm leaning towards something with the gas system/bcg. he will be putting it on a RR, but the problem currently lies with it being used an an SBR lower.This problem still only get worse if he tries to run it on auto 1. Maybe swap out the BCG from the Noveske or another upper that you know doesn't have issues and see if you can replicate it or if it works properly. If it works properly, a new Bolt or complete BCG is in order and Daniel Defense should give you one. If it still fires in burst with a different BCG, maybe gas port or gas tube? [He should absolutely try swapping the boot and carrier between the 2, but i have serious doubts that will be the issue. 2. What is the burst like? Is it evenly timed like an actual select fire or is it completely random/feels like it is malfunctioning? Quoted:
Sounds like bolt bounce to me, as mentioned. The heavier buffer, perhaps a different recoil spring would be the first thing I try. On a semi lower it can't be "bolt bounce". "Bolt bounce" is a timing issue where the hammer falls on its own due to auto sear engagement as the carrier moves rearward. Semi guns can experience bolt bounce, but it's not going to create a full auto situation as the hammer is still on the disconnector while the bolt is bouncing rearward. OP, put a regular semi trigger group in your lower. I bet the light hammer springs of the SSA-E combined with the severe over gassing is causing the hammer to slip of the disconnector when the bolt goes into battery. If this happens I'd try a standard SSA for its heavier springs and upping the buffer weight. Id also see if the LMT enhanced carrier helps out at all. This carrier won't unlock as quickly as a standard carrier. This drops the pressure and the speed which the carrier starts moving at. |
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Posted: 10/19/2014 10:55:33 AM EDT
[#12]
I wanted to verify since he mentioned an M16 lower
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Posted: 10/19/2014 11:17:26 AM EDT
[#13]
There are lots of examples of bolt bounce on semi guns. Just go look at You Tube.
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Posted: 10/19/2014 11:51:41 AM EDT
[#14]
Quote HistoryQuoted:
There are lots of examples of bolt bounce on semi guns. Just go look at You Tube. Do these bolt bounce issues cause slam fires? Or just lead to a dead trigger? |
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Posted: 10/19/2014 1:11:36 PM EDT
[#15]
I'm headed out shortly to try some of the suggestions. To answer a few posed questions
Moose, yes the FA lower is awaiting tax stamp. The burst is just like a select fire FA 3 round burst, smooth as silk. Joe, I am running a H2 buffer (I don't have a heavier buffer on hand) and std carbine spring. I changed out the spring with a springco heavy red spring. I took the firing pin out of the carrier and all looked fine. I'm going to take an extra BCG if the spring does not change things. I will also run the DD BCG in another upper if needed. I live on several hundred acres and am not worried about the wrong person seeing an accidental FA burst. That's said I also don't want to shoot it if there is a safety issue or intentionally shooting it knowing it is going to go FA. Thanks for the suggestions headed out to see what happens now.
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Posted: 10/19/2014 1:19:38 PM EDT
[#16]
Quote HistoryQuoted:
I'm headed out shortly to try some of the suggestions. To answer a few posed questions Moose, yes the FA lower is awaiting tax stamp. The burst is just like a select fire FA 3 round burst, smooth as silk. Joe, I am running a H2 buffer (I don't have a heavier buffer on hand) and std carbine spring. I changed out the spring with a springco heavy red spring. I took the firing pin out of the carrier and all looked fine. I'm going to take an extra BCG if the spring does not change things. I will also run the DD BCG in another upper if needed. I live on several hundred acres and am not worried about the wrong person seeing an accidental FA burst. That's said I also don't want to shoot it if there is a safety issue or intentionally shooting it knowing it is going to go FA.
Thanks for the suggestions headed out to see what happens now. Do you happen to have a shot timer? I'm curious what the ROF is on the 3-rd bursts. If it's a result of overgassing and the H2 buffer isn't helpling, then it's REALLY over-gassed. |
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Posted: 10/19/2014 1:33:23 PM EDT
[#17]
A ssa-e on hard recoiling gun (mk18 supressed) might be you inadvertently bump firing.
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Posted: 10/19/2014 1:59:26 PM EDT
[#18]
Congrats on the NFA purchase, you'll love it!
If I were you I'd contact DD either way, since you'll be putting it (a brand new upper) on a $20k+ lower. It shouldn't have those issues out of the box. |
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Posted: 10/19/2014 3:01:57 PM EDT
[#19]
Quote HistoryQuoted: Congrats on the NFA purchase, you'll love it! If I were you I'd contact DD either way, since you'll be putting it (a brand new upper) on a $20k+ lower. It shouldn't have those issues out of the box. I just shot two 20 round magazines through the DD MK18 upper. The only change was replacing the White springco spring with a red Springco spring. H2 buffer and M4-2000 supressor on same lower. No slamfire a today. I am going to put more through it but I have to say severe over gassing had to be the issue. The rifle is still overgassed, the recoil is still more violent and rough than is should be. Advice? Orange spring or H3 buffer or both? Without the supressor the recoil is normal, the same as all my other 556 SBRs. Thanks for all the advice already posted.
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Posted: 10/19/2014 3:20:32 PM EDT
[#20]
Quote HistoryQuoted: Sounds like bolt bounce to me, as mentioned. The heavier buffer, perhaps a different recoil spring would be the first thing I try. did you function check it? |
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Posted: 10/19/2014 3:21:45 PM EDT
[#21]
Quote HistoryQuoted: There are lots of examples of bolt bounce on semi guns. Just go look at You Tube. function check the gun, that will tell you whats happen despite all the "advice" from the peanut galley |
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Posted: 10/19/2014 3:32:50 PM EDT
[#22]
Quote HistoryQuoted:
bolt bounce cause a auto upper NOT to fire Quote HistoryQuoted:
Quoted:
Sounds like bolt bounce to me, as mentioned. The heavier buffer, perhaps a different recoil spring would be the first thing I try. It's a FA upper on a semi lower. |
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Posted: 10/19/2014 3:44:56 PM EDT
[#23]
Why haven't you contacted Daniel Defense yet?
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Posted: 10/19/2014 4:50:17 PM EDT
[#24]
Call Sprinco - they'll offer advice and are good at. The 'strongest' combo I've used is a Red Spring and H3 buffer on a 7.5" Pistol Length Gas System. Run H2/Red in a Colt M4 14.5", H/White in a lot of mids, H2/Blue in a few mids. If the Red is working, 99% it's overgassing, gas port is probably too large.
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Posted: 10/19/2014 5:45:50 PM EDT
[#25]
Quote HistoryQuoted:
It's a FA upper on a semi lower. Quote HistoryQuoted:
Quoted:
Quoted:
Sounds like bolt bounce to me, as mentioned. The heavier buffer, perhaps a different recoil spring would be the first thing I try. It's a FA upper on a semi lower. And that post shows you have no idea what your talking about. Stop. |
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Posted: 10/19/2014 6:10:41 PM EDT
[#26]
Quote HistoryQuoted:
And that post shows you have no idea what your talking about. Stop. Quote HistoryQuoted:
Quoted:
Quoted:
Quoted:
Sounds like bolt bounce to me, as mentioned. The heavier buffer, perhaps a different recoil spring would be the first thing I try. It's a FA upper on a semi lower. And that post shows you have no idea what your talking about. Stop. So you're saying that a an overgassed carbine with FA BCG could never have a problem with a semi FCG causing this problem? No need to be rude. Give me the benefit of your extensive experience. |
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Posted: 10/19/2014 6:11:43 PM EDT
[#27]
Quote HistoryQuoted:
And that post shows you have no idea what your talking about. Stop. Quote HistoryQuoted:
Quoted:
Quoted:
Quoted:
Sounds like bolt bounce to me, as mentioned. The heavier buffer, perhaps a different recoil spring would be the first thing I try. It's a FA upper on a semi lower. And that post shows you have no idea what your talking about. Stop. Meh. There are two things that a URG needs to be auto that aren't always present on a semi gun so there is in fact a distinction. |
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Posted: 10/19/2014 6:14:55 PM EDT
[#28]
Well, I've heard of doubling on semi-lowers before. It's not like this is the first time this has happened. Thing is, it might run just fine on the RR. I'm wondering now what kind of hammer he's running.
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Posted: 10/19/2014 6:56:17 PM EDT
[#29]
Quote HistoryQuoted:
Well, I've heard of doubling on semi-lowers before. It's not like this is the first time this has happened. Thing is, it might run just fine on the RR. I'm wondering now what kind of hammer he's running. He's using the hammer that comes with the SSA-E. Doubling happens, but it's usually due to incorrect disconnector installation. I seriously doubt it will work on the RR, because it's not functioning in S/A. The upper is a DD MK18, a notoriously overgased gun to begin with. He's added a can, which over gases the gun to begin with. He's also said the recoil is abusive. He's using an SSA-E, a very light trigger with very light springs. What's most likely happening: When an AR cycles it affects all the parts. In this case, it's cycling so hard that it's causing the disconnector to vibrate. The SSA-E uses lighter springs to reduce the pull, and in this case it's not holding the hammer in place and the hammer is slipping off the disconnector before the trigger is released by the shooter. 
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Posted: 10/20/2014 12:35:03 AM EDT
[#30]
I have a wilson combat trigger in my mk18 that will do this if you limp wrist the pistol grip. The combo of the lightweight trigger and extra gas from the suppressor cause it. The issue goes away without the can. I first noticed it when zeroing an optic on the bench with sand bags. I wasn't gripping the pistol grip just laid my hand against it to manipulate the trigger. It startled the hell out of me. In trying to diagnose the issue I realized I was actually bump firing the rifle. The super short reset of the wilson greatly enables the effect. I could see the same thing happening with a geissele. .
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Posted: 10/20/2014 8:41:53 AM EDT
[#31]
Good Morning OP,
I apologize for the issues you have experienced and the headache it has caused. We will gladly get this back in house for an inspection then take the appropriate actions to get this taken care of as quickly and efficiently as we can. I am unsure as to what would cause this particular malfunction within the URG, like you mentioned, but we will definitely get this taken care of. To get this back to us, I will need to generate a Return Materials Material Authorization. Please click on the link to submit your information directly to me electronically. https://danieldefense.com/return-merchandise-policy Once I receive this information from you I will follow up with additional information regarding the return process to get the ball rolling, generate a UPS label to get this back in house free of charge & get more details from you regarding this malfunction. If you have any questions let me know and I will be on the lookout for your response! Best Regards, Caroline Britton Warranty Administrator, Sales [email protected] (912)851-3217 |
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Posted: 10/20/2014 8:44:18 AM EDT
[#32]
I got a little happy and hit submit one too many times
Please see response above! |
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Posted: 10/20/2014 8:50:01 AM EDT
[#33]
Quote HistoryQuoted: He's using the hammer that comes with the SSA-E. Doubling happens, but it's usually due to incorrect disconnector installation. I seriously doubt it will work on the RR, because it's not functioning in S/A. The upper is a DD MK18, a notoriously overgased gun to begin with. He's added a can, which over gases the gun to begin with. He's also said the recoil is abusive. He's using an SSA-E, a very light trigger with very light springs. What's most likely happening: When an AR cycles it affects all the parts. In this case, it's cycling so hard that it's causing the disconnector to vibrate. The SSA-E uses lighter springs to reduce the pull, and in this case it's not holding the hammer in place and the hammer is slipping off the disconnector before the trigger is released by the shooter. http://d3cfki0l5o2ps6.cloudfront.net/media/catalog/product/cache/1/image/547x800/17f82f742ffe127f42dca9de82fb58b1/s/u/super-semi-automatic-e-trigger-pi.jpg Quote HistoryQuoted: Quoted: Well, I've heard of doubling on semi-lowers before. It's not like this is the first time this has happened. Thing is, it might run just fine on the RR. I'm wondering now what kind of hammer he's running. He's using the hammer that comes with the SSA-E. Doubling happens, but it's usually due to incorrect disconnector installation. I seriously doubt it will work on the RR, because it's not functioning in S/A. The upper is a DD MK18, a notoriously overgased gun to begin with. He's added a can, which over gases the gun to begin with. He's also said the recoil is abusive. He's using an SSA-E, a very light trigger with very light springs. What's most likely happening: When an AR cycles it affects all the parts. In this case, it's cycling so hard that it's causing the disconnector to vibrate. The SSA-E uses lighter springs to reduce the pull, and in this case it's not holding the hammer in place and the hammer is slipping off the disconnector before the trigger is released by the shooter. http://d3cfki0l5o2ps6.cloudfront.net/media/catalog/product/cache/1/image/547x800/17f82f742ffe127f42dca9de82fb58b1/s/u/super-semi-automatic-e-trigger-pi.jpg Caroline, thank you for the information and I will be in contact sometime today.
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Posted: 10/20/2014 8:52:54 AM EDT
[#34]
Quote HistoryQuoted: He's using the hammer that comes with the SSA-E. Doubling happens, but it's usually due to incorrect disconnector installation. I seriously doubt it will work on the RR, because it's not functioning in S/A. The upper is a DD MK18, a notoriously overgased gun to begin with. He's added a can, which over gases the gun to begin with. He's also said the recoil is abusive. He's using an SSA-E, a very light trigger with very light springs. What's most likely happening: When an AR cycles it affects all the parts. In this case, it's cycling so hard that it's causing the disconnector to vibrate. The SSA-E uses lighter springs to reduce the pull, and in this case it's not holding the hammer in place and the hammer is slipping off the disconnector before the trigger is released by the shooter. http://d3cfki0l5o2ps6.cloudfront.net/media/catalog/product/cache/1/image/547x800/17f82f742ffe127f42dca9de82fb58b1/s/u/super-semi-automatic-e-trigger-pi.jpg Quote HistoryQuoted: Quoted: Well, I've heard of doubling on semi-lowers before. It's not like this is the first time this has happened. Thing is, it might run just fine on the RR. I'm wondering now what kind of hammer he's running. He's using the hammer that comes with the SSA-E. Doubling happens, but it's usually due to incorrect disconnector installation. I seriously doubt it will work on the RR, because it's not functioning in S/A. The upper is a DD MK18, a notoriously overgased gun to begin with. He's added a can, which over gases the gun to begin with. He's also said the recoil is abusive. He's using an SSA-E, a very light trigger with very light springs. What's most likely happening: When an AR cycles it affects all the parts. In this case, it's cycling so hard that it's causing the disconnector to vibrate. The SSA-E uses lighter springs to reduce the pull, and in this case it's not holding the hammer in place and the hammer is slipping off the disconnector before the trigger is released by the shooter. http://d3cfki0l5o2ps6.cloudfront.net/media/catalog/product/cache/1/image/547x800/17f82f742ffe127f42dca9de82fb58b1/s/u/super-semi-automatic-e-trigger-pi.jpg How long is the reset on a SSA-E? SD3G is about .06 in, I doubt the SSA-E reset is over .1 in. |
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Posted: 10/20/2014 8:55:01 AM EDT
[#35]
Quote HistoryQuoted: Sounds like bolt bounce to me, as mentioned. The heavier buffer, perhaps a different recoil spring would be the first thing I try. For more reading on timing issues on semi auto guns I would read this thread: http://www.ar15.com/forums/t_3_118/655109_BumpSAW_Bump_IAR_Picture_Video_and_theoretical_discussion_thread_.html |
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Posted: 10/20/2014 10:19:53 AM EDT
[#36]
Quote HistoryQuoted: A lot of good points here. There is also a good possibility he is bumping the trigger slightly due to the extra recoil from the over gassed upper and setting the trigger off. How long is the reset on a SSA-E? SD3G is about .06 in, I doubt the SSA-E reset is over .1 in. Quote HistoryQuoted: Quoted: Quoted: Well, I've heard of doubling on semi-lowers before. It's not like this is the first time this has happened. Thing is, it might run just fine on the RR. I'm wondering now what kind of hammer he's running. He's using the hammer that comes with the SSA-E. Doubling happens, but it's usually due to incorrect disconnector installation. I seriously doubt it will work on the RR, because it's not functioning in S/A. The upper is a DD MK18, a notoriously overgased gun to begin with. He's added a can, which over gases the gun to begin with. He's also said the recoil is abusive. He's using an SSA-E, a very light trigger with very light springs. What's most likely happening: When an AR cycles it affects all the parts. In this case, it's cycling so hard that it's causing the disconnector to vibrate. The SSA-E uses lighter springs to reduce the pull, and in this case it's not holding the hammer in place and the hammer is slipping off the disconnector before the trigger is released by the shooter. http://d3cfki0l5o2ps6.cloudfront.net/media/catalog/product/cache/1/image/547x800/17f82f742ffe127f42dca9de82fb58b1/s/u/super-semi-automatic-e-trigger-pi.jpg How long is the reset on a SSA-E? SD3G is about .06 in, I doubt the SSA-E reset is over .1 in. Also, another member here running this same upper FA said he is using an H3 buffer with a blue spring and a surefire can which has less back pressure than the M4-2000. The ROF is slower but it functions flawlessly.
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Posted: 10/20/2014 12:26:21 PM EDT
[#37]
Quote HistoryQuoted:
So you're saying that a an overgassed carbine with FA BCG could never have a problem with a semi FCG causing this problem? No need to be rude. Give me the benefit of your extensive experience. Quote HistoryQuoted:
Quoted:
Quoted:
Quoted:
Quoted:
Sounds like bolt bounce to me, as mentioned. The heavier buffer, perhaps a different recoil spring would be the first thing I try. It's a FA upper on a semi lower. And that post shows you have no idea what your talking about. Stop. So you're saying that a an overgassed carbine with FA BCG could never have a problem with a semi FCG causing this problem? No need to be rude. Give me the benefit of your extensive experience. The only difference between the two is the configuration of the carrier tail. One has more meat the other doesn't. On a semi lower the carrier in no way contacts anything in the lower. There is no relationship between the two that would matter if the carrier was auto or semi cut. |
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Posted: 10/20/2014 12:31:57 PM EDT
[#38]
I bet It's not disconnector bounce. The ssa-e being a two stage isn't really sitting at the end of the engagement surfaces. I say its inadvertent bump fire.
That said, an ssa-e on a mk18 is silly for a number of reasons. A precision-ish trigger on a cqb sbr is kinda meh. |
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Posted: 10/20/2014 1:37:30 PM EDT
[#39]
Quote HistoryQuoted: I bet It's not disconnector bounce. The ssa-e being a two stage isn't really sitting at the end of the engagement surfaces. I say its inadvertent bump fire. That said, an ssa-e on a mk18 is silly for a number of reasons. A precision-ish trigger on a cqb sbr is kinda meh. |
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Posted: 10/20/2014 11:50:38 PM EDT
[#40]
Quote HistoryQuoted:
He's using the hammer that comes with the SSA-E. Doubling happens, but it's usually due to incorrect disconnector installation. I seriously doubt it will work on the RR, because it's not functioning in S/A. The upper is a DD MK18, a notoriously overgased gun to begin with. He's added a can, which over gases the gun to begin with. He's also said the recoil is abusive. He's using an SSA-E, a very light trigger with very light springs. What's most likely happening: When an AR cycles it affects all the parts. In this case, it's cycling so hard that it's causing the disconnector to vibrate. The SSA-E uses lighter springs to reduce the pull, and in this case it's not holding the hammer in place and the hammer is slipping off the disconnector before the trigger is released by the shooter. http://d3cfki0l5o2ps6.cloudfront.net/media/catalog/product/cache/1/image/547x800/17f82f742ffe127f42dca9de82fb58b1/s/u/super-semi-automatic-e-trigger-pi.jpg Quote HistoryQuoted:
Quoted:
Well, I've heard of doubling on semi-lowers before. It's not like this is the first time this has happened. Thing is, it might run just fine on the RR. I'm wondering now what kind of hammer he's running. He's using the hammer that comes with the SSA-E. Doubling happens, but it's usually due to incorrect disconnector installation. I seriously doubt it will work on the RR, because it's not functioning in S/A. The upper is a DD MK18, a notoriously overgased gun to begin with. He's added a can, which over gases the gun to begin with. He's also said the recoil is abusive. He's using an SSA-E, a very light trigger with very light springs. What's most likely happening: When an AR cycles it affects all the parts. In this case, it's cycling so hard that it's causing the disconnector to vibrate. The SSA-E uses lighter springs to reduce the pull, and in this case it's not holding the hammer in place and the hammer is slipping off the disconnector before the trigger is released by the shooter. http://d3cfki0l5o2ps6.cloudfront.net/media/catalog/product/cache/1/image/547x800/17f82f742ffe127f42dca9de82fb58b1/s/u/super-semi-automatic-e-trigger-pi.jpg Great explanation, thank you. |
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Posted: 10/23/2014 8:39:41 AM EDT
[#41]
I own a Colt registered SBR lower and once had it paired with not a MK18 upper but a DD 10.3" standard front sight post barrel with Colt carbine (skinny) handguards. Same thing for the purpose of this discussion.
I also own an AAC M4-2000 can. Rarely (never these days) do the two ever meet. Though I have always run a standard Mil-Spec FCG, and no doubt it's over gassed it runs perfect. I wouldn't even waste time sending your new DD upper back to Daniel Defense as there's nothing defective with it. As I am sure you have realized through the previous discussion it's the combination of an over gassed barrel and the light pull trigger combo that's causing your troubles. Oh, the reason my AAC can never sees my 10.3" DD barreled upper? It's loud as hell to my ears. A 10.3" barrel is extremely hard to quiet down but the real noise COMES FROM THE EJECTION PORT. Besides I'm no "operator" so I do more or less practical things like placing the can on my 20" barreled Remington 700 precision rifle. Talk about quiet that is a very nice and practical combination. Also your combination is very hard on parts. With the price of transferable M16 rifles these days I'm pretty sure I would not pound the hell out of mine with an over gassed barrel and super over gassing it by putting a can on it. Not for me, no way. Was I you (and I'm not) I'd fire the M16 with your shiny new DD MK18 upper naked without a can and let it be loud in all it's 10.3" glory! Good luck, be safe and have fun. IMHO, cans don't belong on 10" rifles....unless of course you're an operator. |
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Posted: 10/23/2014 9:07:23 AM EDT
[#42]
Quote HistoryQuoted:
A ssa-e on hard recoiling gun (mk18 supressed) might be you inadvertently bump firing. This is my guess. Try to pay special attention to the trigger pull and see if this is it? |
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