cutting down BCM 11.5 to 10.5 - gas port issues? - Page 1

[ARCHIVED THREAD] - cutting down BCM 11.5 to 10.5 - gas port issues?

Posted: 1/22/2015 10:40:58 PM EDT

i've got two BCM 11.5 SBRs, and i want to cut one down to 10.5. anyone ever done this? any issues with gas port size? i'm guessing not, given it's only 1" of barrel. the 10.5 will ultimately host a 5.56 Specwar.

right now i have an H2 and it runs like a champ with everything; it also runs fine with an H and H3. appreciate any input.

Posted: 1/23/2015 12:43:56 AM EDT

[#1]

Quoted:
i've got two BCM 11.5 SBRs, and i want to cut one down to 10.5. anyone ever done this? any issues with gas port size? i'm guessing not, given it's only 1" of barrel. the 10.5 will ultimately host a 5.56 Specwar.

right now i have an H2 and it runs like a champ with everything; it also runs fine with an H and H3. appreciate any input.

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I was in basically the exact same situation as you, except I went 10.75 (with no changes made to the gas port) and also run a 556 Specwar on it.

Currently have a BCM H2 in there and it runs flawlessly both suppressed and unsuppressed, just like it did before.

I think you'll be fine.

Posted: 1/23/2015 12:47:00 AM EDT

[#2]

Also should add that I only shoot full power 556 through it. So not sure how it would fair with weaker ammo.

Posted: 1/23/2015 2:58:29 AM EDT

[#3]

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Quoted:

Also should add that I only shoot full power 556 through it. So not sure how it would fair with weaker ammo.

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I appreciate your input. Who'd you use to cut it down?

Posted: 1/23/2015 4:50:02 AM EDT

[#4]

Adco cut my 11.5 to 10.3. Shoots like a dream.

Posted: 1/23/2015 6:20:48 AM EDT

[#5]

Adco is the place for AR barrel work.
Satisfied customer here! Send it with confidence.

Posted: 1/23/2015 9:16:06 AM EDT

[#6]

Quote History

Quoted:
I appreciate your input. Who'd you use to cut it down?

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Quoted:

Quoted:
Also should add that I only shoot full power 556 through it. So not sure how it would fair with weaker ammo.

I appreciate your input. Who'd you use to cut it down?

ADCO, although I wouldn't use them again... I'll probably catch a ton of flak here for that opinion, but they initially screwed up what should have been a simple job.

Posted: 1/23/2015 9:29:49 AM EDT

[#7]

Just curious, but why would you cut just 1" off the barrel??

What do you expect to gain?

Serious question.

Posted: 1/23/2015 10:35:35 AM EDT

[#8]

Quote History

Quoted:

Just curious, but why would you cut just 1" off the barrel??

What do you expect to gain?

Serious question.

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Just looking to gain an inch less of overall length, and do something different.

Posted: 1/23/2015 11:30:43 AM EDT

[#9]

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Quoted:
Just curious, but why would you cut just 1" off the barrel??

What do you expect to gain?

Serious question.

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Seems odd to me as well. The 11.5" BCM barrel is there signature SBR barrel. BCM explains why the 11.5 is betrer than 10.5

I was going to go the 11.5 BCM path but got a hell of a deal on 10.5 barrels.

Why not just buy another barrel and start over?

Posted: 1/23/2015 11:52:16 AM EDT

[#10]

Quote History

Quoted:
ADCO, although I wouldn't use them again... I'll probably catch a ton of flak here for that opinion, but they initially screwed up what should have been a simple job.

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Quoted:

Quoted:

Also should add that I only shoot full power 556 through it. So not sure how it would fair with weaker ammo.

I appreciate your input. Who'd you use to cut it down?

ADCO, although I wouldn't use them again... I'll probably catch a ton of flak here for that opinion, but they initially screwed up what should have been a simple job.

why'd you decide to do 10.75?

Posted: 1/23/2015 11:55:03 AM EDT

[#11]

Quote History

Quoted:
Seems odd to me as well. The 11.5" BCM barrel is there signature SBR barrel. BCM explains why the 11.5 is betrer than 10.5

I was going to go the 11.5 BCM path but got a hell of a deal on 10.5 barrels.

Why not just buy another barrel and start over?

View Quote View All Quotes

View All Quotes

Quote History

Quoted:

Quoted:

Just curious, but why would you cut just 1" off the barrel??

What do you expect to gain?

Serious question.

Seems odd to me as well. The 11.5" BCM barrel is there signature SBR barrel. BCM explains why the 11.5 is betrer than 10.5

I was going to go the 11.5 BCM path but got a hell of a deal on 10.5 barrels.

Why not just buy another barrel and start over?

i've read everything about why the 11.5 is better than the 10.5, which is why i ended up getting two 11.5 uppers for two of my SBRs. they shoot great, and i have absolutely no complaints.

mostly i just want something different, and to change things up. figured if i'm sending my barrel to adco for a $25 barrel thread concentricity check (for the can), i might as well just pay another $35 and have them cut it down (instead of spending a couple hundred bucks on a quality 10.5" barrel). again, not really looking to gain much other than a slightly shorter barrel and have something different than my identical setups.