The Dead Air KeyMo Muzzle Brake in 1/2×28 (Dead Air part no. DA101) is the brake half of Dead Air’s KeyMo mounting system, with a .30 caliber bore for rifles that carry a 1/2×28 muzzle thread. It lets you attach a Sandman series or other KeyMo-equipped suppressor quickly, and with the suppressor off it works as a recoil brake that reduces felt recoil and muzzle rise with less concussion than traditional brakes. The sealed taper design sits forward of the locking channels, so the suppressor detaches easily without carbon-locking to the mount. It is machined from 4140 heat-treated alloy steel and finished in black nitride. For a threaded rifle that will see both suppressed and unsuppressed use, this Dead Air brake does both jobs.

Key Specifications

• The muzzle thread is 1/2×28, the pitch that decides which barrels this version fits.
• The bore is .30 caliber, sized for the rifle cartridges that run on a 1/2×28 muzzle.
• The weight is 4.42 ounces, a modest load on the end of the barrel.
• The material is 4140 heat-treated alloy steel, which suits a part that sees hard recoil and heat.
• The finish is black nitride, a hard, corrosion-resistant surface.
• It has a pre-drilled pin and weld hole at the 6 o’clock position, for builds that need a permanently attached brake.
• The mount is a sealed taper design forward of the locking channels, which keeps the suppressor from carbon-locking to the mount.
• The brake is a multi-port design, which reduces felt recoil and muzzle rise when you shoot unsuppressed.
• It mounts Sandman series suppressors directly, so no adapter is needed on those cans.
• Other suppressors need a KeyMo adapter installed before they will mount to this brake.

Frequently Asked Questions

What thread and bore does this KeyMo brake have? This version is threaded 1/2×28 and has a .30 caliber bore. Dead Air sells the KeyMo muzzle brake in other thread pitches and bore sizes as separate part numbers.

Can it be pinned and welded? Yes. This part number has a pre-drilled hole at the 6 o’clock position for pin and weld installation.

Which suppressors mount to it? Dead Air Sandman series suppressors mount directly. Other suppressors can use it once a KeyMo adapter is installed.

Buy the Dead Air KeyMo Muzzle Brake, 1/2×28, .30 Caliber Bore

The KeyMo system exists so one muzzle device can serve a suppressor and still be useful once the suppressor comes off. This 1/2×28 brake does that with a taper mount that lets go cleanly and ports that tame recoil. Order it from our Lubbock, Texas gun shop for fast, direct shipping, and see more suppressor parts and accessories.