As of August 1st 2022, Element Armament will not sell nor ship magazines with capacities greater than 10 rounds to the following states: California, Connecticut, Washington, D.C., Maryland, Massachusetts, New York, New Jersey, Vermont and Washington. By utilizing the Element Armament website and/or affiliated selling channels, the user/purchaser acknowledges that he/she is not a resident of the referenced states or locales and will not transport restricted or illegal items into those states.

Blackout Defense – KeyMo FG42 Muzzle Device – 223REM/556NATO – 1/2×28

SKU: BlackoutDefense-KeyMo-FG42 Categories: , ,


Blackout Defense is 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.

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
Shim kit included

MATERIAL: 17-4 stainless steel
THREADS: 1/2-28
BORE DIAMETER: 8.50mm (.3346”)
FINISH: H900 (appears as a deep gold/bronze color)

Additional information

Weight 1 lbs
Dimensions 4 × 4 × 4 in

Black Nitride, H900


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