Dead Air Sierra 5 KeyMo 5.56mm Colbalt/Steel Suppressor - Black

Dead Air Sierra 5 KeyMo 5.56mm Colbalt/Steel Suppressor - Black

Equip your tactical carbine with dedicated, hard-use suppression and signature reduction with the Dead Air Silencers® Sierra 5 KM. Engineered under Dead Air’s "No Quarter" design ethos, the Sierra 5 is purpose-built from the ground up to address the unique demands of the 5.56 NATO platform. Delivering an uncompromising balance between decibel reduction, aggressive flash mitigation, and maneuverability, this compact suppressor provides duty-grade reliability without adding unwieldy front-end weight or inducing harsh gas blowback into the shooter's face.

Built to endure the most punishing firing schedules, the Sierra 5 features a core of ultra-tough, heat-treated Stellite® baffles joined by full-penetration laser welding and fused directly to a 17-4 PH stainless steel outer tube. The exterior features Dead Air’s signature tactile knurling, providing a secure grip for installation and removal while anchoring thermal suppressor covers securely in place. Outfitted with the industry-standard 1.375x24 HUB socket, this package ships complete with Dead Air’s battle-proven KeyMo quick-detach adapter and a 1/2x28 KeyMo flash hider. With an interchangeable flash-hider front cap, no barrel length restrictions, and an energy rating exceeding 2,200 ft-lbs, the Sierra 5 KM represents the definitive dedicated 5.56 silencer.

Features

Optimized 5.56 Platform Baffle Architecture:
Acoustically tuned specifically for 5.56 NATO / .223 Rem dynamics, delivering exceptional sound and flash suppression alongside a low-backpressure, short-impulse gas profile.

Cobalt-Alloy Stellite® Baffles:
Constructed with high-strength Stellite baffles that provide class-leading erosion resistance against violent unburnt powder blast and extreme temperatures during high-volume shooting.

Full-Penetration Welded Monolithic Core:
Baffles are fully laser-welded together and joined directly to the outer tube, creating an indestructible monolithic structure capable of handling intense duty cycles.

Functional Knurled Stainless Outer Tube:
Machined from 17-4 PH stainless steel with functional exterior knurling, providing a non-slip purchase for hand-tightening while preventing suppressor wraps from slipping under recoil.

Universal 1.375x24 HUB Socket Modularity:
Features standard 1.375x24 HUB rear threading, giving shooters the modular freedom to configure the can with KeyMo, Xeno, direct-thread, or third-party mounting systems.

Turnkey KeyMo QD System Included:
Ships out of the box with the legendary Dead Air KeyMo HUB adapter and a 1/2x28 KeyMo flash hider, providing rapid, one-handed attachment with guaranteed repeatable concentricity.

Interchangeable Flash Hider Front Cap:
Comes factory-equipped with a flash-mitigating front cap and retains full compatibility with Dead Air R-Series front caps and the Sandman E-Brake, allowing field replacement in the event of an end-cap strike.

Zero Barrel Length Restrictions:
Carries a heavy-duty 2,200+ ft-lb energy rating with no minimum barrel restrictions, ensuring total peace of mind on everything from short-barreled tactical carbines to precision rifles.

Specifications