--- title: "Dead Air Sierra 5 KeyMo 5.56 | Rifle Silencer" description: "Enhance your shooting experience with the Dead Air Sierra 5 KeyMo. Its advanced features such as the quick detach KeyMo mounting system, durable stainless steel construction, and compact design makes this a rifle suppressor you need. Buy now at KYGUNCO!" canonical_url: "https://www.kygunco.com/product/dead-air-sierra5km-sierra-5-km-5.56-silencer-with-flash-hider" meta: author: KYGUNCO "og:description": "Enhance your shooting experience with the Dead Air Sierra 5 KeyMo. Its advanced features such as the quick detach KeyMo mounting system, durable stainless steel construction, and compact design makes this a rifle suppressor you need. Buy now at KYGUNCO!" "og:image": "https://cdn.kygunco.com/assets/products/226533/thumbnail.jpg?v=1713454793" "og:image:height": "500" "og:image:width": "500" "og:title": "Dead Air Sierra 5 KeyMo 5.56 | Rifle Silencer" --- > Index of every page on this site: [llms.txt](https://www.kygunco.com/llms.txt) [Home](https://www.kygunco.com/) / [Shooting](https://www.kygunco.com/category/shooting) / [Guns](https://www.kygunco.com/category/shooting/guns) / [Class III](https://www.kygunco.com/category/shooting/guns/class-iii) / [Suppressors](https://www.kygunco.com/category/shooting/guns/class-iii/suppressors) / DDR-SIERRA5KM ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/226533/main.jpg?v=1713454793) For illustration purposes only, this image may not be an exact representation of the product. # DEAD AIR Sierra 5 KeyMo 5.56 6.27" Rifle Silencer / Suppressor - Black Email for Price ** 5 interest-free payments of **$155.80** with ![Sezzle logo](https://www.kygunco.com/brands/sezzle.svg) ** Online In Store ** Free Shipping Enjoy delivery to the Lower 48 States at no cost. ** NFA / Class 3 NFA transfer requirements vary by product and location. Additional documentation, approvals, or a qualified dealer may be required. Check local and state regulations to ensure eligibility and compliance before purchasing. ** Ships To FFL Dealer Handled by our expert shippers in Bardstown, KY. ** Check Local Restrictions Not sure whether this item can be shipped to your area? Enter your ZIP code for a quick check. Item # 226533 Style DDR-SIERRA5KM UPC 810128160001 Condition New Manufacturer [Dead Air Armament](https://www.kygunco.com/brand/dead-air-armament) Model Sierra Finish Black Caliber 5.56 NATO, 308 Win Weight 3 lb Action Silencer Introducing the all-new 5.56 silencer from Dead Air. From the beginning, our mission has been to take No Quarter in design, performance, and technology. The Sierra-5 stands true to that mission by giving you everything you want out of a dedicated 5.56 silencer. Built for professional use, it offers the perfect balance of overall sound and flash suppression while maintaining a compact footprint and minimal weight. By utilizing HUB compatible (1.375-24) mounting adapters, it can be configured to the end user’s specific needs and is available out of the box with either our KeyMo or Xeno mounting system. Featuring the proven winning combination of welded Stellite baffles wrapped in a stainless outer tube, the Sierra-5 boasts a clean and utilitarian knurled design that provides both function and form. Highlights: - BAFFLE GEOMETRY AND DESIGN: Optimized specifically for high-performance out of the 5.56 platform in sound and flash suppression, while maintaining a low blowback, short-pressure impulse. - STELLITE BAFFLES: Industry leader in super high strength and erosion resistance at high temperatures. - FULLY-WELDED CONSTRUCTION: Full penetration laser welding ensures a robust and solid monolithic core structure. The core is then welded to the outer tube for additional strength and durability. - STAINLESS KNURLED OUTER TUBE CONSTRUCTION: The outer tube is knurled to provide a strong purchase for securing and removing the silencer. It also serves extremely well at securing heat-protective wraps. - MODULARITY OF THE 1.375-24 “HUB” SOCKET: The modularity of the HUB socket allows for adapters to easily be swapped out. This includes Xeno, KeyMo, and direct thread. - FLASH HIDER FRONT CAP: Aids in excellent visual signature reduction - HEAVY LUG TOOL FEATURES: Allows for securely tightening and loosening adapters with included tools. - FRONT CAP SOCKET: The Sierra-5 can accept the Sandman E-Brake and all R-Series front caps. In the event of an endcap strike, you can change the cap without having to send the whole silencer in for warranty. Features: - MATERIALS: Stellite baffles, 17-4 PH Stainless Steel - FINISH: High temp Cerakote®, Nitride adapter and mount - CALIBER RATING: 5.56/.223, 224 Valkyrie - ENERGY RATING: 2200+ ft lbs - BARREL RESTRICTIONS: None Specifications: - DIAMETER: 1.55” - LENGTH: 6.27" - WEIGHT: 15.4oz - MOUNT: KeyMo (included) - INCLUDES: KeyMo Adapter, KeyMo 1/2-28 Flash Hider, TL Tool Pack Shop with KYGUNCO for the best selection, competitive pricing, and exceptional customer service. Experience the difference that comes with buying from a trusted outdoor retailer with over 20 years of experience in the industry. ** WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to [www.p65warnings.ca.gov](https://www.p65warnings.ca.gov). ## Watch The Product In Action ## Frequently Bought Together 0.0 ** ** ** ** ** 0 reviews ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ## Don't Forget Your Ammo ```json {"@context":"https://schema.org","@graph":[{"@id":"https://www.kygunco.com/#website","@type":"WebSite","description":"Shop KYGUNCO for firearms, ammo, accessories, parts, and outdoor gear at low prices with fast, easy nationwide shipping.","name":"KYGUNCO","url":"https://www.kygunco.com/","publisher":{"@id":"https://www.kygunco.com/#/schema/organization/kygunco"}},{"@id":"https://www.kygunco.com/product/dead-air-sierra5km-sierra-5-km-5.56-silencer-with-flash-hider#webpage","@type":"WebPage","description":"Enhance your shooting experience with the Dead Air Sierra 5 KeyMo. 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