Dead Air Sierra 5 suppressor for .223 Rem / 5.56 NATO with KeyMo adapter and included 1/2-28 KeyMo flash hider. Welded Cobalt 6 baffles, stainless outer tube, 15.4 oz. weight and 6.27″ overall length.
The Dead Air Sierra 5 is a compact suppressor engineered for 5.56 platforms, designed to reduce report and flash in a durable, serviceable package. It features welded Cobalt 6 baffles and a stainless steel outer tube to withstand heavy firing schedules. The suppressor ships with a KeyMo adapter and a 1/2-28 KeyMo flash hider for secure quick-detach mounting. Typical applications include precision/target shooting and professional training on range systems.
Product Specifications
The brand is Dead Air Silencers.
The model is listed as Sierra 5.
The caliber rating is .223 REM/5.56 NATO.
The unit ships with a KeyMo adapter and a 1/2-28 KeyMo flash hider.
The baffle material is Cobalt 6 and the outer tube is stainless steel.
The finish is Cerakote body with a nitrided muzzle (Black).
The overall length measures 6.27″.
The outside diameter measures 1.55″.
The weight is 15.4 oz..
The NFA classification is Silencer.
The product type is listed as NFA – Silencer.
The NFA attachment method is Quick Detachable.
The ATF manufacturer and model are listed as DEAD AIR and SIERRA 5, respectively.
Can be disassembled for user servicing is listed as False.
UPC: 810042342637.
Built for durability and repeatable performance, the Sierra 5 balances compact dimensions with robust materials and a modular mounting system. Its KeyMo quick-detach interface and included 1/2-28 KeyMo flash hider make it straightforward to integrate with compatible 5.56 platforms, while the Cobalt 6 baffles and stainless outer tube prioritize long-term service life and consistent function. For shooters who value a rugged, low-profile suppressor for range work and precision applications, the Sierra 5 delivers dependable engineering in a compact footprint.
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