The Dead Air Sierra 5 KeyMo is a rugged, duty-grade 5.56 suppressor engineered for shooters who demand uncompromising durability, reliable suppression performance, and secure mounting capability under extreme firing conditions. Purpose-built as a true hard-use silencer, the Sierra 5 is optimized for aggressive firing schedules, sustained training sessions, and professional applications where reliability matters most.
Built around a proven combination of welded Cobalt 6 baffles and a stainless steel outer tube, the Sierra 5 delivers exceptional durability while maintaining a compact footprint and excellent sound and flash suppression performance. Dead Air intentionally designed the Sierra 5 to prioritize strength and service life over shaving minimal weight, making it ideal for high-round-count carbines, SBRs, and full-auto platforms.
The Sierra 5 utilizes the highly respected Dead Air KeyMo mounting system, one of the industry’s most trusted quick-detach suppressor mounting systems. The KeyMo system provides an extremely secure lockup with repeatable return-to-zero performance while resisting carbon lock during heavy firing schedules. Its fast attachment and removal design allows shooters to quickly transition the suppressor between rifles while maintaining reliable alignment and retention.
In addition to the included KeyMo mounting system, the Sierra 5 also supports HUB compatible (1.375x24) mounting adapters, giving users the flexibility to configure the suppressor with a wide range of industry-standard mounting solutions if desired. This HUB compatibility enhances long-term versatility and allows the suppressor to adapt to evolving rifle setups and mounting preferences.
Designed specifically as a hard-use suppressor, the Sierra 5 is fully capable of handling high heat, rapid strings of fire, and demanding operational environments. It is full-auto rated with no barrel length restrictions, making it suitable for everything from compact SBRs to hard-running duty rifles. Its compact dimensions help minimize added rifle length while still delivering excellent suppression and flash reduction performance.
Whether used for professional duty applications, training, defensive setups, or high-volume recreational shooting, the Sierra 5 delivers premium suppression performance in a compact, battle-ready package.
FEATURES
- Dead Air KeyMo Quick-Detach Mounting System
- HUB Compatible (1.375x24) Adapter Support
- Hard-Use 5.56 Suppressor Design
- Full-Auto Rated Construction
- No Barrel Length Restrictions
- Welded Cobalt 6 Baffles
- Stainless Steel Outer Tube
- Compact & Lightweight Configuration
- Excellent Flash & Sound Suppression
- Optimized for Heavy Firing Schedules
- Professional & Duty-Grade Durability
- Ideal for Carbines & SBR Platforms
- Black Cerakote Finish
- 5.56 NATO & .224 Valkyrie Rated
IMPORTANT SPECS
- Manufacturer: Dead Air Silencers
- Model: Sierra 5
- UPC: 810128160001
- SKU: SIERRA5KM
- Suppressor Type: Rifle Suppressor
- Caliber Rating: 5.56 NATO / .224 Valkyrie
- Energy Rating: 2200+ ft-lbs
- Bore Diameter: 5.56mm
- Mount Compatibility: HUB Compatible (1.375x24)
- Included Mounting System: KeyMo
- Length (No Adapter): 4.87"
- Diameter: 1.5"
- Weight (No Adapter): 10.8 oz
- Materials:
- Welded Cobalt 6 Baffles
- Stainless Steel Outer Tube
- Finish: Black Cerakote
- Usage: Ideal for Heavy Firing Schedules
- Barrel Restrictions: None
- Full Auto Rated: Yes
- Patent Number: 11441867
Factory Configuration Includes:
- Dead Air Sierra 5 Suppressor
- KeyMo Mounting System
- Manufacturer Documentation
