The Dead Air KeyMo 46 Muzzle Brake in 5/8-32 (brand part no. DA162) is the big-bore member of the KeyMo family, built to brake calibers up to .458 while giving a suppressor a fast, repeatable mount. Dead Air designed it for rifle barrels with little or no shoulder, so it seats against the muzzle itself and needs no shim set. The ports are shaped to distribute gas and pressure inside the silencer for better performance and longer service life. It suits a heavy-recoiling hunting or tactical rifle that runs a KeyMo suppressor part of the time and a brake the rest.

Key Specifications

• The thread pitch is 5/8-32, one of four options in the KeyMo 46 line, so confirm your barrel before ordering.
• The brake is rated for calibers up to .458, which is what makes this the big-bore KeyMo muzzle device.
• Overall length is 2.58 inches, compact enough to keep a rifle balanced with the brake alone.
• Weight is 3.3 ounces for this thread pitch, light for a full-ported steel brake.
• It is machined from 4140 heat-treated chromium-molybdenum steel, a strong alloy that stands up to heavy-recoil blast.
• The finish is black nitride, a hard surface treatment that resists wear and corrosion.
• A muzzle-seating design means no shims are needed, which helps on barrels with little to no shoulder.
• The ports distribute gas and pressure inside the silencer, which supports performance and extends the life of the can.
• Removal is easy because the suppressor does not carbon-lock onto the mount, a common headache with direct-thread attachment.

Frequently Asked Questions

What suppressors does the KeyMo 46 work with? Dead Air states the KeyMo 46 is compatible with all of its KeyMo adapter-equipped silencers.

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

What should I check before mounting a suppressor on it? Dead Air notes that you should consider the caliber limitations of the suppressor when mounting the KeyMo 46 on your rifle.

Buy the Dead Air KeyMo 46 Muzzle Brake, 5/8-32

Anyone running a .458-class rifle knows that recoil control and a dependable suppressor mount are separate problems, and this brake solves both with one part. Browse more Class 3 parts and accessories from our Lubbock, Texas gun shop and order for fast, direct shipping.