The Dead Air Sierra-5 (brand part no. SIERRA5KM) is a 5.56mm suppressor measuring 4.87 inches long, built around Dead Air’s quick-detach Key Mount system. Dead Air Silencers threads the Sierra-5’s mount in a 1/2×28 pattern for compatibility with standard AR-platform muzzle threads. The Sierra-5 favors 5.56 shooters who want a compact, quick-detach can via the Key Mount system.

Key Specifications

• Rated for 5.56mm ammunition.
• Measures 4.87 inches long.
• Threaded 1/2×28 via the Key Mount.
• Uses a quick-detach (QD) Key Mount system.
• Built with welded Stellite/Cobalt 6 baffles in a stainless steel tube, weighing roughly 13.3-15.4 ounces depending on mount.

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 Key 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.