The Blackout Defense KeyMo flash hider in 1/2×28 with a black nitride finish is a closed-prong muzzle device built to carry a Dead Air KeyMo suppressor mount. It is machined from 17-4 stainless steel, heat treated in house to condition H900, then finished in black nitride for added lubricity, surface hardness and corrosion resistance. Every 90-degree corner is undercut to improve seal and engagement with the suppressor, and a shim kit comes in the box for indexing on the barrel. Blackout Dynamics (formerly Blackout Defense) is officially licensed and approved by Dead Air to use the KeyMo mount design.

Key Specifications

• The thread is 1/2-28, which has to match your barrel; the 1/2-28 bore diameter is 8.50mm (.334 inch).
• Construction is 17-4 stainless steel heat treated to H900, rated 45 to 47 HRC for through-hardness.
• The finish is black nitride, which adds lubricity, surface hardness and corrosion resistance.
• The closed-prong design reduces flash and eliminates the tuning-fork ping of open-prong hiders.
• A shim kit is included for indexing the device on the barrel.

Frequently Asked Questions

Which suppressors does it mount? It is made for Dead Air KeyMo-equipped suppressors. Blackout Dynamics (formerly Blackout Defense) is officially licensed and approved by Dead Air to use the KeyMo mount design.

Does it come in other threads? Yes. Blackout Dynamics also makes the KeyMo flash hider in 5/8-24, and both threads come in black nitride or H900.

Buy the Blackout Defense KeyMo Flash Hider, 1/2×28, Black Nitride

A KeyMo-ready flash hider gives a rifle flash control today and a fast path to a KeyMo suppressor later. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and browse more AR muzzle devices while you are here.