Blackout Defense Muzzle KEYMO FG42 H900 5/8-24 .350 Bore

We are officially licensed and approved by Dead Air Silencers to incorporate their KeyMo mount design with our muzzle device designs. The KeyMo FG42 is compatible with Dead Air's KeyMo-equipped silencers. FEATURESIn-house heat treated to condition H900 for a through-hardness of 45-47 HRC17-4 stainless steel that is heat treated to condition H900 exhibits 14% higher ultimate tensile strength over hardened 4140 steelShim kit included