The Sierra 5 KM is designed for heavy-duty 5.56 use. Constructed with fully laser-welded Stellite® baffles surrounding a stainless steel tube, this suppressor delivers durability and consistent performance under rigorous firing schedules. It attaches via the KeyMo quick-detach system, completing setup with a flash-hider front cap.
Rated for full-auto fire with no minimum barrel length restrictions, the Sierra 5 KM features an optimized design that balances compact size with sound and flash suppression.
When configured with the KeyMo adapter and cap, the suppressor measures 6.27″ long, 1.55″ in diameter, and weighs 15.4 oz. A shorter configuration without the adapter caps the length at 4.87″ and weight at 10.8 oz. Materials include Stellite® baffles and 17-4 PH stainless steel tube, all finished in black high-temp Cerakote.
Key Features:
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Caliber Rating: 5.56 NATO, also supports .223 Rem and 224 Valkyrie
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Mount: KeyMo quick-detach with flash-hider front cap
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Material: Stellite® baffles, 17-4 PH stainless steel tube
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Finish: Black high-temp Cerakote
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Full-auto rated, no barrel-length restrictions
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Length/Weight Compact: 4.87″ / 10.8 oz
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Length/Weight KeyMo: 6.27″ / 15.4 oz
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Diameter: 1.55″
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Bore: 5.56 mm
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Energy Rating: 2,200+ ft-lbs
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Includes KeyMo mount and tool pack
FAQ:
Q: What mount system does the Sierra 5 KM use?
A: It uses Dead Air’s KeyMo quick-detach mount and includes a flash-hider front cap.
Q: Is it full-auto rated?
A: Yes—fully capable of sustained auto fire with no barrel-length limitations.
Q: What calibers is it rated for?
A: Rated for 5.56 NATO, and compatible with .223 Rem and 224 Valkyrie.
Q: How much does it weigh and measure?
A: Compact: 4.87″ / 10.8 oz; with KeyMo mount: 6.27″ / 15.4 oz; diameter: 1.55″.
Brought to you by Black Bayou Armory.
