The Dead Air KeyMo 46 Muzzle Brake 5/8-24 is a big-bore quick-detach muzzle brake from Dead Air Silencers (brand part no. DA161), threaded 5/8-24. It fits a rifle up to .458 caliber that carries a 5/8-24 muzzle thread. It uses a muzzle-seating design that does not need shims, and the ports spread gas and pressure through a Dead Air suppressor. The body is 4140HT chromium-molybdenum steel with a Black Nitride finish, and the brake is compatible with all Dead Air KeyMo adapter-equipped silencers.

Key Specifications

• The muzzle thread is 5/8-24, the pitch that decides which barrels this version fits.
• It is rated for calibers up to .458, which is why Dead Air calls it a big-bore KeyMo muzzle device.
• Material is 4140HT chromium-molybdenum steel, heat treated to take big-bore recoil loads.
• The finish is Black Nitride, which adds corrosion and wear resistance.
• Overall length is 2.58 inches, compact for a big-bore brake.
• Weight is 3.4 ounces, light for a big-bore brake.
• It uses a muzzle-seating design that requires no shims, which helps on barrels with little to no shoulder.
• The ports distribute gas and pressure inside a Dead Air suppressor, supporting performance and a longer service life.
• The suppressor removes without carbon-locking onto the mount, which keeps maintenance simple.
• It is compatible with all Dead Air KeyMo adapter-equipped silencers, a quick-detach attachment method.

Frequently Asked Questions

Do I need shims to install it? No. The KeyMo 46 uses a muzzle-seating design that does not require shims, which suits barrels with little to no shoulder.

What thread does this KeyMo 46 use? This version is threaded 5/8-24. Dead Air also offers the KeyMo 46 in other pitches, so match it to your muzzle thread.

What calibers is the KeyMo 46 for? Dead Air describes it as a big-bore KeyMo muzzle device for calibers up to .458. Dead Air also notes that you should consider the caliber limitations of your suppressor when mounting it.

Buy the Dead Air KeyMo 46 Muzzle Brake 5/8-24

With a 5/8-24 thread, this KeyMo 46 puts a big-bore brake and the KeyMo interface on a very common muzzle thread. Order it from our Lubbock, Texas gun shop for fast direct shipping, and browse more Class 3 parts and accessories while you are here.