Dead Air Xemax Deadair Da154 Xemax Muzzle Brake M18x1.5 Ai 338lm

The Dead Air Xemax DA154 is a purpose-built muzzle brake for .338 Lapua Magnum and other large-bore rifles that demand serious recoil management and suppressor compatibility. Engineered around Dead Air's Xeno Mounting Technology, this brake pairs seamlessly with Dead Air suppressors—both the Nomad 33 and Primal platforms—while delivering real performance whether you run it solo or suppressed. If you're shooting a bolt-action .338 LM or any large-caliber precision rifle and want a brake that works *with* your suppressor rather than against it, this is built for that mission.

The Xemax design uses a self-aligning taper system to ensure consistent bore concentricity and repeatable suppressor alignment every time you mount it. Single-port gas routing vectors blast outward and upward, cutting ground dust signature and felt recoil without the side-blast penalty of multi-port brakes. When threaded directly to your barrel, it operates independently; when paired with a Nomad 33 or Primal silencer, it's optimized to maximize suppressor performance and lifespan. Dead Air engineered the Xemax *bigger* to handle the pressures of .33- and .45-caliber magnums, so you're not adapting a mid-size brake to a big-bore job.

The brake comes with shims for timing—a straightforward process that ensures the ports are oriented correctly for your setup. Weighing 3.40 ounces and measuring 2.06 inches long with a 1.125-inch diameter, it's proportioned for serious rifles without adding unnecessary bulk. The M18x1.5 thread pitch is standard for many precision platforms, including Accuracy International rifles chambered in .338 Lapua.

Key Features

• Self-aligning taper system for consistent bore concentricity and suppressor repeatability
• Single-port design minimizes ground dust and reduces felt recoil when fired unsuppressed
• Optimized for use with Dead Air Nomad 33 and Primal silencers to extend suppressor life
• Engineered for large-bore calibers: .338 Lapua Mag, .338-378 Wby Mag, .33 XC, 8.6 Blackout
• Includes shims for proper timing
• Robust construction handles magnum-class pressures

Specifications

Frequently Asked Questions

Will this muzzle brake work with Dead Air suppressors?

Yes. The Xemax DA154 is optimized for use with the Dead Air Nomad 33 and Primal silencers. The self-aligning taper system ensures consistent bore alignment when suppressed, and the brake is designed to maximize suppressor performance and lifespan when paired with these models.

What calibers does the M18x1.5 Xemax work with?

This brake is optimized for .338 Lapua Magnum, .338-378 Weatherby Magnum, .33 XC, and 8.6 Blackout—all .33-caliber magnums and large-bore cartridges that demand robust recoil management.

Can I use this brake without a suppressor?

Yes. The single-port design is engineered to vector gas outward and upward, reducing felt recoil and minimizing ground dust signature when fired unsuppressed. It operates effectively as a standalone brake.

Does this brake require timing?

Yes, the Xemax DA154 requires timing. It comes with shims to allow you to orient the ports correctly for your rifle setup. Proper timing ensures optimal performance and safe operation.