Really short barrel rifle (.300BO)

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[ARCHIVED THREAD] - Really short barrel rifle (.300BO)

Posted: 2/27/2014 8:01:12 PM EDT

I decided to cut down to 6" on my .300blk. Say goodbye dwell time! :)

I don't know if it will cycle without the can, but I only shoot it suppressed so I'm not too worried. With more can in the handguard I shouldn't burn myself on auto anymore. And it's a 14.5" barrel with the can now, much more manageable.

***VIDEO of the gun firing on page 2***

Posted: 2/27/2014 8:11:59 PM EDT

[#1]

Nice!

Posted: 2/28/2014 4:56:06 AM EDT

[#2]

That looks really nice, but are you worried about baffle strikes?

Posted: 2/28/2014 5:30:06 AM EDT

[#3]

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Quoted:
That looks really nice, but are you worried about baffle strikes?

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Why would I? 6" is plenty of room to stabilize.

Posted: 2/28/2014 8:29:29 AM EDT

[#4]

Looks great. I am curious to hear how well it runs with the gas port so close to the muzzle. Regardless, that's one nice, compact package. Enjoy!

Posted: 2/28/2014 8:55:50 AM EDT

[#5]

I like it, now how does it shoot?

Posted: 2/28/2014 9:20:18 AM EDT

[#6]

That is nice.

Posted: 2/28/2014 6:32:19 PM EDT

[#7]

What length hand guard?

Posted: 2/28/2014 8:03:32 PM EDT

[#8]

That upper makes my pants tighter then watching football after thanksgiving dinner..

Posted: 3/1/2014 12:28:26 PM EDT

[#9]

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Quoted:
What length hand guard?

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That is a Samson evo 11"

Posted: 3/1/2014 4:02:21 PM EDT

[#10]

Thanks.

Is there an advantage of the 11" over the 12.37" model (besides ~1oz)?

Posted: 3/1/2014 6:15:28 PM EDT

[#11]

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Quoted:
Thanks.

Is there an advantage of the 11" over the 12.37" model (besides ~1oz)?

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It's slightly cheaper, haha. I don't know, I have 5 samson rails, I just kind of pick and choose, move rail from one gun to the other. If I had a longer rail I would have used it.

Posted: 3/1/2014 7:37:05 PM EDT

[#12]

Quote History

Quoted:
It's slightly cheaper, haha. I don't know, I have 5 samson rails, I just kind of pick and choose, move rail from one gun to the other. If I had a longer rail I would have used it.

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Quoted:

Quoted:

Thanks.

Is there an advantage of the 11" over the 12.37" model (besides ~1oz)?

It's slightly cheaper, haha. I don't know, I have 5 samson rails, I just kind of pick and choose, move rail from one gun to the other. If I had a longer rail I would have used it.

OK. That makes sense. I really like what you've done with this. I currently have three SBR stamps pending and I'm trying to get ideas.

Posted: 3/1/2014 7:52:24 PM EDT

[#13]

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Quoted:
OK. That makes sense. I really like what you've done with this. I currently have three SBR stamps pending and I'm trying to get ideas.

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Quote History

Quoted:

Quoted:
Thanks.

Is there an advantage of the 11" over the 12.37" model (besides ~1oz)?

It's slightly cheaper, haha. I don't know, I have 5 samson rails, I just kind of pick and choose, move rail from one gun to the other. If I had a longer rail I would have used it.

OK. That makes sense. I really like what you've done with this. I currently have three SBR stamps pending and I'm trying to get ideas.

Well, .300 blk is all about subsonic. So for me barrel length is pointless as it only impedes maneuverability and adds weight. I primarily use the rifle for hunting pigs and shooting from vehicles. Long barrels take too long to swing out of a window. I only shoot it suppressed so as short as it will function is what I'm going to choose.

Posted: 4/15/2014 8:17:23 PM EDT

[#14]

Finally took it out to shoot. Had some trouble cycling, wasn't getting a full stroke... but it wasn't too far off. Disassembled and measure the gas port at .080" which is wayyy too small, even for it's factory length. I took it out to .096" and we'll see how it does.

Posted: 4/15/2014 11:08:50 PM EDT

[#15]

I like what you did.

Posted: 4/16/2014 9:46:10 AM EDT

[#16]

Looks awesome!!!

Posted: 4/16/2014 9:51:03 AM EDT

[#17]

Quote History

Quoted:
Finally took it out to shoot. Had some trouble cycling, wasn't getting a full stroke... but it wasn't too far off. Disassembled and measure the gas port at .080" which is wayyy too small, even for it's factory length. I took it out to .096" and we'll see how it does.

View Quote

I hope this fixes it. Good luck! Let us know when it is running full speed!

Posted: 4/17/2014 2:11:04 AM EDT

[#18]

That's not a short rifle....

This is a short rifle.

Posted: 4/17/2014 3:25:14 AM EDT

[#19]

Posted: 4/21/2014 5:01:58 PM EDT

[#20]

Nice!

BigDozer66

Posted: 4/21/2014 5:22:22 PM EDT

[#21]

Post pics of the suppressor after you send a few rounds down range....and wear eye protection

Posted: 4/21/2014 7:50:35 PM EDT

[#22]

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Quoted:
Post pics of the suppressor after you send a few rounds down range....and wear eye protection

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Pics after I send a few rounds down range? Is something going to change? I shot 5 mags through it yesterday, it looks the same. I assume you think the can is going to contact the handguard?

Posted: 4/21/2014 8:52:12 PM EDT

[#23]

so .096 cycled subs/supers with the can reliably?
I have a 10.5" that i want to cut down...

Posted: 4/21/2014 8:58:24 PM EDT

[#24]

Quote History

Quoted:
so .096 cycled subs/supers with the can reliably?
I have a 10.5" that i want to cut down...

View Quote

I didn't have a chance to run any subsonics through the gun. Trying to tame some nasty bolt bounce with the .300 upper and trying to use the most violent rounds I can. But, I will definitely take it out this week to let you know if it's running or if I'll need to open it up more.

Posted: 4/21/2014 9:17:53 PM EDT

[#25]

Thanks. I was thinking about cutting mine to 7-7.5" but gas port data is hard to come by for 300 BLK, and I don't have anything other than a dewalt drill (no press) so I'd rather give ADCO or whoever my preferred port size and not have to touch it after that.

Posted: 4/26/2014 6:34:20 PM EDT

[#26]

.096" is starting to cycle, but in auto I could only get 2-3 shot bursts. It would not lock back on a full mag, going to have to go just slightly bigger and it should be good.

Posted: 4/26/2014 8:33:35 PM EDT

[#27]

Nice work!

Posted: 4/27/2014 3:44:43 AM EDT

[#28]

Would one of those pigtail gas tubes help in dwell time?

Posted: 4/27/2014 10:43:54 AM EDT

[#29]

what can is that?

Posted: 4/27/2014 11:48:55 AM EDT

[#30]

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Quoted:
what can is that?

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It's an SAS Arbiter Ti

Posted: 4/27/2014 4:18:16 PM EDT

[#31]

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Quoted:

It's an SAS Arbiter Ti

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Quoted:

Quoted:
what can is that?

It's an SAS Arbiter Ti

I just redrilled to .109" and this should be the sweet spot. I will report when I get it verified.

Posted: 4/27/2014 8:17:07 PM EDT

[#32]

I'm going with a 7" and .104 I think should be the sweet spot for that. Let me know how .109 goes for that 6.0" barrel!

Posted: 5/2/2014 2:50:41 PM EDT

[#33]

Quote History

Quoted:
I'm going with a 7" and .104 I think should be the sweet spot for that. Let me know how .109 goes for that 6.0" barrel!

View Quote

I took it out today to finally test the larger port and realized I had my phone with me, so I made a quick video.

YouTube

The cyclic rate is very low, which I like, however that may be indicative of too low gas still. I'll have to do some more shooting.

Posted: 5/2/2014 3:38:28 PM EDT

[#34]

Quote History

Quoted:

I took it out today to finally test the larger port and realized I had my phone with me, so I made a quick video.

YouTube

The cyclic rate is very low, which I like, however that may be indicative of too low gas still. I'll have to do some more shooting.

View Quote View All Quotes

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Quote History

Quoted:

Quoted:
I'm going with a 7" and .104 I think should be the sweet spot for that. Let me know how .109 goes for that 6.0" barrel!

I took it out today to finally test the larger port and realized I had my phone with me, so I made a quick video.

YouTube

The cyclic rate is very low, which I like, however that may be indicative of too low gas still. I'll have to do some more shooting.

Is it wrong that I felt nothing but hateful jealousy while watching your video?

Posted: 5/2/2014 7:19:14 PM EDT

[#35]

Quote History

Quoted:

Is it wrong that I felt nothing but hateful jealousy while watching your video?

View Quote View All Quotes

View All Quotes

Quote History

Quoted:

Quoted:
I'm going with a 7" and .104 I think should be the sweet spot for that. Let me know how .109 goes for that 6.0" barrel!

I took it out today to finally test the larger port and realized I had my phone with me, so I made a quick video.

YouTube

The cyclic rate is very low, which I like, however that may be indicative of too low gas still. I'll have to do some more shooting.

Is it wrong that I felt nothing but hateful jealousy while watching your video?

Hehehe, I know how you feel. It's a healthy motivator.

Posted: 5/3/2014 10:30:02 AM EDT

[#36]

I am interested to see your accuracy shooting from a rest now.
Still haven't sent off my barrel to ADCO...

Dang nice full auto...

Posted: 5/3/2014 10:45:06 AM EDT

[#37]

Quote History

Quoted:
I am interested to see your accuracy shooting from a rest now.
Still haven't sent off my barrel to ADCO...

Dang nice full auto...

View Quote

I will test that here shorty. Next on the agenda is a 247gr mold so I can do some coated cast bullets from here on out. Time to make .300blk subsonic affordable.

Posted: 5/3/2014 11:03:05 AM EDT

[#38]

Very nice work. Looks fun.

Posted: 5/3/2014 12:07:08 PM EDT

[#39]

Quote History

Quoted:

I will test that here shorty. Next on the agenda is a 247gr mold so I can do some coated cast bullets from here on out. Time to make .300blk subsonic affordable.

View Quote View All Quotes

View All Quotes

Quote History

Quoted:

Quoted:
I am interested to see your accuracy shooting from a rest now.
Still haven't sent off my barrel to ADCO...

Dang nice full auto...

I will test that here shorty. Next on the agenda is a 247gr mold so I can do some coated cast bullets from here on out. Time to make .300blk subsonic affordable.

Does the coating keep the lead from building up on suppressor baffles?

I have a 220 gr mold but haven't even started since I know cast bullets and non-serviceable suppressors are a no go.

Posted: 5/3/2014 12:13:41 PM EDT

[#40]

Quote History

Quoted:

Does the coating keep the lead from building up on suppressor baffles?

I have a 220 gr mold but haven't even started since I know cast bullets and non-serviceable suppressors are a no go.

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Quote History

Quoted:

Quoted:
I am interested to see your accuracy shooting from a rest now.
Still haven't sent off my barrel to ADCO...

Dang nice full auto...

I will test that here shorty. Next on the agenda is a 247gr mold so I can do some coated cast bullets from here on out. Time to make .300blk subsonic affordable.

Does the coating keep the lead from building up on suppressor baffles?

I have a 220 gr mold but haven't even started since I know cast bullets and non-serviceable suppressors are a no go.

Yes it does, that's the same reason I'm concerned. Some have shown it even produces less debris than copper jackets. Also, an added bonus is you don't need to lube the bullets, the molds don't need lube groves, and the gun doesn't smoke at all when fired.

Posted: 5/3/2014 12:37:35 PM EDT

[#41]

Any update on how this cycles suppressed/unsuppressed?

Posted: 5/3/2014 12:42:05 PM EDT

[#42]

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Quoted:
Any update on how this cycles suppressed/unsuppressed?

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It runs fine on supersonic unsuppressed, I did not try subsonic unsuppressed.. but not sure why anyone would, to be honest, hehe.

Posted: 5/3/2014 12:45:20 PM EDT

[#43]

Nice Video !

Posted: 5/4/2014 6:44:44 AM EDT

[#44]

Sixxers all around

Posted: 5/4/2014 1:20:49 PM EDT

[#45]

Interesting buffer/stock. What kind of spring are you running?

Posted: 5/5/2014 10:34:55 PM EDT

[#46]

The one supplied with the stock, stock, BCG, buffer and spring are all proprietary.

Posted: 5/6/2014 8:29:30 AM EDT

[#47]

Quote History

Quoted:
The one supplied with the stock, stock, BCG, buffer and spring are all proprietary.

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Interesting, I wonder if that would run in auto without bolt bounce.

Posted: 5/6/2014 12:40:05 PM EDT

[#48]

It has been done, videos on MFG website, not sure if it required modification to prevent bounce, my guess is it didn't the buffer is built into the BCG, the spring is short and stiff.

Posted: 5/9/2014 1:35:44 PM EDT

[#49]

you should make a video of it running with and without the can, would be interested in seeing that!

[ARCHIVED THREAD] - Really short barrel rifle (.300BO)

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