05-29-2011, 04:10 AM
LHClarke,
Try it without the 9mm SMG buffer-those are way heavier than even an H2 buffer. You shouldn't need that heavy of a buffer. Also, it's very difficult for the hammer to follow the bolt carrier, but your guess at the hammer not resetting due to the extra resistance from the insane buffer mass makes sense, as well as the stove pipes. AR15's rarely stove pipe...
Be advised that most/all of the major manufacturers (assemblers) of AR15's source their MIM'd small parts from the same places, so CMMG, RRA, DPMS, etc. might not be all that different.
Put a Spike's ST-T2 or an H2 buffer in there with a standard recoil spring and see what happens. When putting a new AR together, I highly recommend having 3 different buffer weights to try out with your gas system length, barrel length, and loads. Those 9mm SMG buffers are that heavy because there is no locking mechanism on them, so they are completely blow-back operated, and recoil like a son of a gun.
Is this on a carbine extension tube?
LRRPF52
Try it without the 9mm SMG buffer-those are way heavier than even an H2 buffer. You shouldn't need that heavy of a buffer. Also, it's very difficult for the hammer to follow the bolt carrier, but your guess at the hammer not resetting due to the extra resistance from the insane buffer mass makes sense, as well as the stove pipes. AR15's rarely stove pipe...
Be advised that most/all of the major manufacturers (assemblers) of AR15's source their MIM'd small parts from the same places, so CMMG, RRA, DPMS, etc. might not be all that different.
Put a Spike's ST-T2 or an H2 buffer in there with a standard recoil spring and see what happens. When putting a new AR together, I highly recommend having 3 different buffer weights to try out with your gas system length, barrel length, and loads. Those 9mm SMG buffers are that heavy because there is no locking mechanism on them, so they are completely blow-back operated, and recoil like a son of a gun.
Is this on a carbine extension tube?
LRRPF52