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Thread: 11.5” Mid Length Barrel Discussion

  1. #61
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    Tried the LMT E-Carrier (FA Gen 5) with a spare BCM Bolt. I was going to use the original WMD bolt but it was really really tight in the LMT E-carrier.

    Still using the A5H2, Wolf Gold 223 55gr.

    Setting 4 – Extraction no BHO
    Setting 5 – Extraction, BHO

    So I was able to reduce the gas by 1 click compared to the "normal" WMD carrier. I did notice the brass was going forward, about 2 o'clock. I did not have time to try the A5H4 but I am thinking I might buy an A5H3 to step my way up.

  2. #62
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    Was that with, or without a can?

  3. #63
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    I shot suppressed. For my purposes this 11.5M is 100% suppressed.

    I only shot it without a suppressor to make sure it was not key-holing initially. Without a suppressor and no muzzle device, it was on setting 7 for extraction and BHO using Wolf Gold. With the suppressor it went to 6 and I supposed I expected a bigger delta. And now I am at 5 with the LMT E-Carrier. Reminder this is the SLR Sentry adjustable gas block.

    Where the brass goes seems like a sore subject but my thought process is that if the 223 is landing at 2 o'clock then the 5.56 will go even further forward. Next time I will try Mk262 with the A5H2 back-to-back with the Wolf Gold at setting 5. Then I will tune the Wolf to the A5H4 and see what I get.

  4. #64
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    Quote Originally Posted by Rayrevolver View Post
    I shot suppressed. For my purposes this 11.5M is 100% suppressed.

    I only shot it without a suppressor to make sure it was not key-holing initially. Without a suppressor and no muzzle device, it was on setting 7 for extraction and BHO using Wolf Gold. With the suppressor it went to 6 and I supposed I expected a bigger delta. And now I am at 5 with the LMT E-Carrier. Reminder this is the SLR Sentry adjustable gas block.

    Where the brass goes seems like a sore subject but my thought process is that if the 223 is landing at 2 o'clock then the 5.56 will go even further forward. Next time I will try Mk262 with the A5H2 back-to-back with the Wolf Gold at setting 5. Then I will tune the Wolf to the A5H4 and see what I get.
    You may find little to no adjustment is required when moving up to the A5H4. This is gun to gun, so far, but there seems to be a synergy with the heavier buffer.
    "That thing looks about as enjoyable as a bowl of exploding dicks." - Magic_Salad0892

    "The body cannot go where the mind has not already been."

  5. #65
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    Im playing with a nice small port barrel sbr carbine upper. I specifically used pmc to test it, when it got a little dirty it would fail to lock back on an empty mag until I added oil to the bcg port. I tried both the A5H4 and then A5H3. It has the green sprinco spring and np3 bcg

    Next time I will try a standard bcm rifle spring and try the lmt carrier with bcm bolt I have in another upper. From my humble position, Ive wondered if that will give me continual lock back on an empty mag without suppressor using PMC

  6. #66
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    Quote Originally Posted by JG007 View Post
    Im playing with a nice small port barrel sbr carbine upper. I specifically used pmc to test it, when it got a little dirty it would fail to lock back on an empty mag until I added oil to the bcg port. I tried both the A5H4 and then A5H3. It has the green sprinco spring and np3 bcg
    How small is small?
    Last edited by Clint; 02-05-16 at 20:39.
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    BRT CustomTUNE Gas Ports

  7. #67
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    Reckon about .069 on a 10.7"

  8. #68
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    So what's the general consensus on those that have them, compared to the carbine 11.5's? I decided to order everything for this yesterday(11.5 Gunner Barrel, SLR 6, kmr 10 etc..), instead of going with another BCM built KMR 11.5. Going to be running a standard auto BCG and for now a H2 buffer. Going to set the gun up to run un-suppressed and leave it a little over gassed for when my Specwar K is out of jail, which will still mostly be on the rifle 95% of the time.

    My current BCM 11.5 has a e-carrier, H2 buffer and has my SF 7.62 mini pretty much dedicated to it and it runs great with everything I've tried. Read a couple reviews here, so just seeing if there is anymore feedback from people who have them already. I'm excited to try it out.

  9. #69
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    While I do not have an example of that can to see how it effects operation I have been involved with the mid gas 11.5" combination, as with the carbine length and carbine +1" system.
    If you look at the curves of operation and superimpose those, you will see the drift in distance when the gas system drifts this far.
    If the system is dedicated suppressed, it may be great. If it is other than that, then YMMV.
    The simulation in function of the barrel length of the selected can does have a big impact on this. When the curves are spread this far apart, the added length in barrel simulation may be larger than what you want.

  10. #70
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    Quote Originally Posted by tom12.7 View Post
    While I do not have an example of that can to see how it effects operation I have been involved with the mid gas 11.5" combination, as with the carbine length and carbine +1" system.
    If you look at the curves of operation and superimpose those, you will see the drift in distance when the gas system drifts this far.
    If the system is dedicated suppressed, it may be great. If it is other than that, then YMMV.
    The simulation in function of the barrel length of the selected can does have a big impact on this. When the curves are spread this far apart, the added length in barrel simulation may be larger than what you want.
    Yeah, I'll probably just have to run it and see how it does. Going to get it to run with the least amount of gas I can and low power ammo while unsuppressed and just leave the gas block there,hopefully it's not over gassed when suppressed, but I imagine it'll be OK.

    Be fun to test it out next to my carbine length 11.5 and see how they stack up.

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