6315KM is based on FCD's 6315 flash suppressor/comp, it is compatible with Dead Air 223 sound suppressors. Precision machined from solid 4140 bar stock and black nitrided, 6315KM's 3 and 9 o'clock ports are 25% smaller (shorter and narrower) than the other three upward facing ports so more gas is vented through the upward facing ports, it is a superior compensator to the A2, its flash suppression is equal to that of an A2. 6315KM is compatible with Dead Air 5.56mm sound suppressors. Note that since 6315KM does have flash suppression capability equal to that of an A2, it is to be treated as a flash suppressor for states that feel threatened by them, such as Mfg: Forward Controls Design