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Thread: FA Bolt Carrier Group vs. adding a heavier buffer

  1. #11
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    Quote Originally Posted by mike_556 View Post
    What if the currently owned bolt is NOT MPI? Replacethe whole group then? And have headspace checked?
    All it means is that someone once shot a proof round and then looked for cracks. You can examine it yourself.

  2. #12
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    FA carrier doesnt weigh that much more than a semi carrier

  3. #13
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    Quote Originally Posted by ForTehNguyen View Post
    FA carrier doesnt weigh that much more than a semi carrier
    i dont remember weights off the top of my head, but i believe there's as much weight difference between a 15 and 16 carrier as there is between a C and H buffer, even more of a difference between C-cut carriers and 16 carriers.

    somebody feel free to post actual weights if you know 'em.

  4. #14
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    Quote Originally Posted by ForTehNguyen View Post
    FA carrier doesnt weigh that much more than a semi carrier
    Indeed. The weight diff is neglibible. Buffer is where you want to dial your weight in.

  5. #15
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    Quote Originally Posted by bkb0000 View Post
    i dont remember weights off the top of my head, but i believe there's as much weight difference between a 15 and 16 carrier as there is between a C and H buffer, even more of a difference between C-cut carriers and 16 carriers.

    somebody feel free to post actual weights if you know 'em.
    found my notepad where the weights were recorded. BCM FA BCG is 11.5oz, and then my delton AR15 BCG was 11.1oz

  6. #16
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    These are carbine buffer weights I've seen in other threads:

    Standard 2.9 oz
    H 3.8 oz
    H2 4.7 oz
    H3 5.6 oz
    9mm 5.5 oz

    Also I'm almost certain I've heard that there's about 0.9-1.0 oz. difference between a shrouded AR and full M16 carrier, about the same as the difference between a standard carbine buffer and H-buffer like bkb0000 said.
    Last edited by Quentin; 08-08-10 at 20:46.

  7. #17
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    I like running a ligthened carrier (6.25 oz) and buffer (3 oz) myself. Rifle is super flat and likes running DIRTY.

    Rich
    "Pressure is what you feel when you don't know what you're doing." - Chuck Knox

    For those that say USPSA/IPSC/3-Gun isn't tactical...speed is a tactic!

  8. #18
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    Quote Originally Posted by dorchester View Post
    Say FA BCG and an H buffer versus a SA BCG and an H2 buffer. The reciprocating mass is probably about the same, so what would be the functional difference, if any?
    if i understand it correctly, even if the reciprocating mass is the same for the two combinations, there'll be a difference between the two. this is because that the weights in the buffer reciprocate within the buffer body itself. in other words, the motion of the weights do not follow the same exact motion as the buffer body when it moves. so, a heavier buffer will have more contribution to reduction in bolt bounce than the same weight in a heavier carrier.
    if the buffers were solid, then there wouldn't be a difference between combinations.

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