The Dead Air KeyMicro Brake 1/2-28 (Dead Air part no. DA109) is a short, lightweight single port muzzle brake with a 9mm bore. It is machined from 4140 heat-treated alloy steel with a black nitride finish and measures 2.063 inches long. Dead Air designed it for the KeyMicro Adapter, and it also works with the KeyMo Adapter or as a minimalist brake on its own. The 1/2-28 thread is the pitch to pick for a standard half-inch threaded muzzle.

Key Specifications

• The muzzle thread is 1/2-28, the pitch that decides which barrels this version fits.
• The through bore is 9mm, which Dead Air lists for every KeyMicro muzzle device.
• Material is 4140 heat-treated alloy steel, a strong steel for heat and repeated mounting.
• The finish is black nitride, which adds corrosion and wear resistance.
• Overall length is 2.063 inches, short enough to keep the muzzle compact.
• Weight is 3.41 ounces, as Dead Air lists for the KeyMicro Brake.
• The design is a single port brake, a short, lightweight take on recoil control.
• It is designed for the KeyMicro Adapter and also works with the KeyMo Adapter.
• A shim kit ships with the brake, for timing it on the muzzle.
• On its own it functions as a minimalist muzzle brake, so it is useful bare as well as with an adapter.

Frequently Asked Questions

Which thread does this KeyMicro Brake use? This is the 1/2-28 version. Dead Air also makes the KeyMicro Brake in 1/2-36 and 5/8-24, so match the pitch to your barrel.

What does it mount to? Dead Air designed it for the KeyMicro Adapter, and it is also compatible with the KeyMo Adapter.

Does it come with a shim kit? Yes. KeyMicro Brakes ship with a shim kit in the packaging for timing the brake.

Buy the Dead Air KeyMicro Brake 1/2-28 Single Port, 9mm

The KeyMicro system pairs a muzzle device with a quick attach adapter, and this 1/2-28 brake is the entry point for barrels with the standard thread. It earns its spot even without the adapter, since the brake works bare. Find the adapter and more in our silencer parts and accessories, and order from our Lubbock, Texas gun shop for fast shipping.