Dead Air Keymicro Brake Deadair Da120 Keymicro Fh 5/8-24 Sig Taper

The Dead Air Keymicro Brake DA120 is a compact flash hider engineered for shooters who demand a lightweight muzzle solution without the bulk. Built from 4140 heat-treated alloy steel and finished in durable black nitride, this 5/8x24 Sig Taper threaded device measures just over 2 inches long and weighs between 3.36 and 3.52 ounces—making it an ideal choice for modern sporting rifles, short-barreled platforms, and precision setups where barrel length and weight matter. Whether you're running a dedicated suppressor host or prefer to go unsuppressed, the Keymicro works as a standalone flash hider while also pairing seamlessly with Dead Air's KeyMicro Adapter to unlock compatibility with the industry-proven KeyMo mounting system.

Dead Air's design philosophy centers on modularity and reliability, and the Keymicro Brake reflects that commitment. The same proven technology that made the KeyMo system a standard across competitive shooters and hunters carries into this minimalist package. Thread it directly onto your 5/8x24 Sig Taper barrel for immediate flash reduction, or integrate it into a suppressor-ready setup by adding the compatible KeyMicro Adapter. This flexibility means you're not locked into a single configuration—your muzzle device can evolve with your rifle's mission.

The through-bore is optimized for .30 caliber ammunition, giving you clearance for centerfire rifle rounds while maintaining the compact profile that makes short-barreled rifles practical. If you're building or upgrading a precision rifle, short-barrel hunting rig, or AR pistol setup, the Keymicro Brake offers the Dead Air engineering you trust in a form factor that doesn't waste an inch of real estate.

Key Features

• Compact 2.063-inch length minimizes overall gun footprint
• Lightweight at 3.36–3.52 oz—minimal impact on velocity or handling
• 5/8x24 Sig Taper threading for modern tactical and sporting platforms
• 4140 heat-treated alloy steel construction with black nitride finish for corrosion resistance
• Compatible with KeyMicro Adapter and KeyMo suppressor mounting system
• Functions as standalone flash hider or suppressor host platform
• .30 caliber through-bore suitable for most rifle cartridges

Specifications

Frequently Asked Questions

Is the Dead Air Keymicro Brake DA120 compatible with suppressors?

Yes. The Keymicro functions as a standalone flash hider but is also compatible with Dead Air's KeyMicro Adapter, which allows integration with the KeyMo suppressor mounting system. This makes it an excellent foundation for a suppressor-ready rifle setup.

What firearms does the 5/8x24 Sig Taper threading fit?

The 5/8x24 Sig Taper thread pattern is common on modern tactical and sporting rifles with .30 caliber barrels. Verify your specific barrel threading before purchase—this device is designed for 5/8x24 Sig Taper only.

Can I use the Keymicro Brake on a short-barreled rifle or AR pistol?

Yes. At just over 2 inches in length and under 3.5 ounces, the Keymicro is well-suited for short-barreled platforms where every inch and ounce counts. Its compact design makes it a practical choice for SBR and AR pistol builds.

What's included with the purchase?

The Dead Air Keymicro Brake DA120 is the muzzle device only. The KeyMicro Adapter and any suppressors are sold separately.