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  1. #16
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    I'm tempted to try this out on a suppressed short barrel.

  2. #17
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    Quote Originally Posted by UWone77 View Post
    I'm tempted to try this out on a suppressed short barrel.
    Me, too.

    I have a VLTOR upper that's put together with a Sionics 11.5" barrel. I'll try a few rounds through it with my AAC 7.62 suppressor.

    Also curious to try with a select fire lower to see how the cyclic rate changes.

    Sent from my SM-G930P using Tapatalk

  3. #18
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    This is getting more interesting as I read.

    In this video below at about 1:30 he states that it will keep the bolt in lock up in battery for longer than a standard BCG. I wonder how much longer, and if that may or may not help alleviate some port pop on semi auto suppressed applications?

    https://www.youtube.com/watch?v=uUJa...ature=youtu.be

    If it's decreasing chamber pressure by about 15% that could in theory have a pretty significant impact on at the ear numbers for suppression, especially out of an SBR.

  4. #19
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    The info on the back of the packaging.

    Sent from my SM-G930P using Tapatalk

  5. #20
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    Quote Originally Posted by usbp379 View Post
    The info on the back of the packaging.

    Sent from my SM-G930P using Tapatalk
    Maybe I am wrong here but I am thinking through this. ( Dangerous I know right? )

    If there is extended lock up time, and particularly on SBRs that gives the bullet substantially more time to travel down the bore and exit the muzzle (or at least enter the suppressor), thus dropping the pressure and forcing the gas forward more such as in a bolt action rifle.

    If everything works the way that I think it would work it would have the equivalent effect (sound wise) of shooting out of a longer barrel rifle and decreasing the back pressure for gassy face and possibly a sound reduction. If my thinking is correct the sound reduction part would come from opening the system up while physically being under less pressure and hence less pop.

    How that would translate into real world sound reduction (at the ear) I don't know. I emailed them and asked if they tested this. Even a 4-5 DB reduction at the ear would be pretty cool.

  6. #21
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    In the video below the suppressed at the ear numbers for a 10.5" SBR are over 149 almost 150 DB. Out of a 16" those same cans at the ear were reduced by around 6 DB.

    If that's true then with this BCG a 16" AR would meter in at the ear around 136-137 DB range. If it works like that. Big if. I would like to see testing.

    https://www.youtube.com/watch?v=a_LuHzfzYtc

  7. #22
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    Weights for comparison.

    The Surefire with counterweight:

    A standard GI style from BCM:




    Both weights taken with carriers completely assembled.

  8. #23
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    Weight of the buffer included with the carrier:

    Sent from my SM-G930P using Tapatalk

  9. #24
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    Packaging says H weight buffer.

    I assume the weight(s) inside are standard stuff. I'm going to guess it would be possible to add a tungsten weight if desired.

    Sent from my SM-G930P using Tapatalk

  10. #25
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    Quote Originally Posted by alamo5000 View Post
    In the video below the suppressed at the ear numbers for a 10.5" SBR are over 149 almost 150 DB. Out of a 16" those same cans at the ear were reduced by around 6 DB.

    If that's true then with this BCG a 16" AR would meter in at the ear around 136-137 DB range. If it works like that. Big if. I would like to see testing.

    https://www.youtube.com/watch?v=a_LuHzfzYtc
    Based on this using a 15% reduction in pressure it would make a 10.5" SBR reduce at the port door to something akin to a 12.5" to 14.5".

    However on a 16" gun still using the same formula it would reduce port noise down to about an 18" barrel length.

    If it's linear.

    Basically like having an extra 2-3" on the barrel for noise purposes. It probably would reduce the noise at the ear but realistically probably not by much. Maybe 2 or 3 DB.

    Attachment 6292

  11. #26
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    Quote Originally Posted by UWone77 View Post
    I'm tempted to try this out on a suppressed short barrel.
    Torture test gun ...

    Haha remember that

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