Blackout Defense Keymo Flash Hider 1/2-28 Muzzle Device

We are officially licensed and approved by Dead Air Silencers to incorporate their KeyMo mount design with our muzzle device designs. The KeyMo Flash Hider is compatible with Dead Air's KeyMo-equipped silencers. Note: Our 5/8-24 muzzle devices are NOT compatible with 9mm. Features In-house heat treated to condition H900 for a through-hardness of 45-47 HRC 17-4 stainless steel that is heat treated to condition H900 exhibits 14% higher ultimate tensile strength over hardened 4140 steel Every 90Adeg corner is machined with undercut profiles to improve seal and engagement with the suppressor Closed-prong design reduces flash and eliminates tuning-fork "ping" Shim kit included Specifications Material: 17-4 stainless steel Threads: 1/2-28 & 5/8-24 1/2-28 bore diameter: 8.50mm (.334") 5/8-24 bore diameter: 9.0mm (.354"), Not for use with 9mm ammunition Finish: H900 (appears as a deep gold/bronze color), Black Nitride finish - offers added lubricity, additional surface hardness, and corrosion resistance