Dead Air Sierra 5 KM | 5.56 | 1/2-28 | SIERRA5KM

The Dead Air Sierra 5 KM is a compact, hard-use suppressor configured with the KeyMo quick-detach system and supplied 1/2-28 KeyMo flash hider. It uses welded Stellite baffles wrapped in a stainless outer tube and is marketed for sustained firing schedules and professional applications. The suppressor is rated for 5.56 NATO and is also listed as compatible with .223 Remington and .224 Valkyrie.

Typical applications include precision/varmint rifle work and professional range or training use where a compact, full-auto-rated suppressor is required. The KeyMo system provides fast attachment and a low-profile transition when paired with the included flash hider.

Product Specifications

• The model is Sierra 5 KM (KeyMo).
• The caliber rating is 5.56 NATO; compatible with .223 Rem and .224 Valkyrie.
• The mount system included is KeyMo.
• The package includes a 1/2-28 KeyMo flash hider.
• The thread pattern is 1/2-28.
• The baffle material is welded Stellite.
• The outer tube material is 17-4 PH stainless steel.
• The listed finish is Black Cerakote with the adapter and mount noted as nitride.
• Length (no adapter) is 4.87 inches.
• Length (with KeyMo) is 6.27 inches.
• Weight (no adapter) is 10.8 ounces.
• Weight (with KeyMo) is 15.4 ounces.
• The suppressor is full-auto rated with no barrel length restrictions.
• The published energy rating is 2200+ ft lbs.
• UPC: 810128160001.

The Sierra 5 KM is designed for users who need a durable, compact suppressor with quick-detach capability and proven baffle materials. Its combination of welded Stellite baffles and a stainless tube yields a robust unit suitable for demanding use while the KeyMo mount and included flash hider provide a low-profile installation. If you prioritize service life, a compact footprint, and flexibility for professional- or competition-oriented shooting, the Sierra 5 KM delivers a clear, no-nonsense package.

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