The Dead Air Sierra-5 (brand part no. SIERRA5XM) is a 5.56-rated suppressor measuring 5.7 inches long, built around Dead Air’s quick-detach Xeno mount system. Dead Air Silencers threads the Sierra-5’s Xeno mount in a 1/2-28 tpi pattern for compatibility with standard AR-platform muzzle threads. The Sierra-5 favors 5.56 shooters who want a quick-detach can via the Xeno mount system.

Key Specifications

• Rated for 5.56mm/.223 Remington ammunition.
• Measures 5.7 inches long.
• Threaded 1/2-28 tpi via the Xeno mount.
• Uses a quick-detach (QD) Xeno mount system.
• Weighs approximately 13.3 ounces alone (15.4 ounces with the mount), built with welded Stellite/Cobalt 6 baffles in a stainless steel tube.

Frequently Asked Questions

Is this an NFA item? Yes. As a suppressor, it's a Title II firearm requiring an approved ATF Form 4 and transfer through an NFA-licensed dealer.

What caliber is it rated for? 5.56mm.

How does it mount? Via Dead Air’s quick-detach Xeno mount system.

Buy the Dead Air Sierra-5 Suppressor

This is a Title II item regulated under the National Firearms Act. Purchase requires an approved ATF Form 4 and transfer through a licensed NFA (SOT/Class 3) dealer, with no federal transfer tax and an extended federal approval wait before delivery. Order through Dead Air Silencers‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will walk you through the transfer process.