Carefully designed and built from 10 individual components, the longer AR-SOB-A2 suppressor optimized buffer is a spring loaded, staggered impact, urethane buffered design which is compatible with the Armalite AR10 carbine length buffer tube, Griffin AR-10 Maritime Receiver Extension, or "Vltor A5" length tube and utilizes the A2 rifle length spring. Engineers of some note going back to people who worked with Eugene Stoner have held an opinion that the A2 rifle length action spring with its greater number of coils promotes smoother operation and better reliability than the carbine spring. The AR-SOB-A2 in conjunction with the Armalite AR10 Griffin AR-10 Maritime Receiver Extension or "VLTOR A5" length tube allows the 5.56mm or 300BLK AR15 to be compatible with the A2 action spring. The reciprocal and non-reciprocal weights are nearly identical to the AR-SOB buffer. In conjunction with shock dampening brass weights, the AR-SOB-A2 offers increased system dwell time...