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 – Key-Mo Hybrid Muzzle Device – 223REM/556NATO – 1/2×28

UPC: 785939519396 SKU: BlackoutDefense-KeyMo-Hybrid Categories: , ,


Blackout Defense is officially licensed and approved by Dead Air Silencers to incorporate their Key-Mo mount design into their muzzle device designs. The Key-Mo Hybrid is compatible with Dead Air’s Key-Mo 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
Every 90º corner is machined with undercut profiles to improve seal and engagement with the suppressor
4 jet ports drilled at 51 degrees to direct gas forward and away from the shooter
2 jet ports at 12 o’clock, 1 at 4 o’clock and 1 at 8 o’clock
Recessed jet ports with a flat face to reduce carbon buildup on the device and improve ease of separation with a suppressor
Forward-directed gas reduces muzzle rise, softens recoil, and pushes all explosive gasses away from the shooter
Closed-prong design reduces flash and eliminates tuning-fork “ping”
Shim kit included

MATERIAL: 17-4 stainless steel
THREADS: 1/2-28
FINISH: H900 (appears as a deep gold/bronze color), Black Nitride finish – offers added lubricity, additional surface hardness, and corrosion resistance

Additional information

Weight 1 lbs
Dimensions 4 × 4 × 4 in

Black Nitride, H900


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