Dead Air Silencers Sierra-5Xm - 5.56 Silencer W/ Xeno Mount
$699.00
$859.00
(You save
$160.00
)
The Dead Air Silencers Sierra-5Xm is a purpose-built 5.56 rifle suppressor engineered for shooters who demand both performance and durability without compromise. This is a dedicated 5.56 silencer rated for full-auto use with no barrel length restrictions—built to handle serious firing schedules where heat and pressure are part of the job. Dead Air's philosophy shows throughout: welded Cobalt 6 baffles, stainless steel construction, and zero cost-cutting on materials that matter. The Sierra-5Xm ships configured with the Xeno mounting system, so you're ready to suppress out of the box, but the HUB-compatible design (1.375-24") lets you swap adapters and front caps as your setup evolves.
What sets the Sierra-5Xm apart is the balance it strikes between sound and flash reduction while staying compact and light for its class. The included flash hider front cap works hard on muzzle signature, and you can swap it for other R-Series caps—including the E-Brake—without tools or permanent changes. The fully welded construction (baffles laser-welded to the outer tube) creates a monolithic core that handles heavy use without degradation. The knurled outer tube isn't decoration; it gives you a solid grip for installation, removal, and securing heat wraps during sustained fire. Heavy lug tooling makes adapter changes secure and straightforward.
Whether you're running a rifle at the range, hunting, or putting rounds downrange professionally, the Sierra-5Xm delivers the reliability and modularity serious shooters expect. It's the kind of suppressor that rewards hard use—literally. Dead Air designs these to get hot when you shoot them hard, and they'll keep performing.
Key Features
- Welded Cobalt 6 baffles for durability and heat resistance
- Full-auto rated with no barrel length restrictions
- Included flash hider reduces muzzle signature
- Compatible with R-Series interchangeable front caps
- HUB-compatible (1.375-24") for mounting modularity
- Fully welded stainless steel outer tube for maximum strength
- Knurled design for secure grip and heat wrap attachment
- Ships with complete Xeno system (adapter and flash hider)
- Optimized for 5.56 NATO and .224 Valkyrie
Specifications
| Caliber | 5.56 NATO, .224 Valkyrie |
| Energy Rating | 2200+ ft-lbs |
| Bore Diameter | 5.56mm |
| Length (no adapter) | 4.87 inches |
| Length (with Xeno) | 5.72 inches |
| Diameter | 1.5 inches |
| Weight (no adapter) | 10.8 ounces |
| Weight (with Xeno) | 13.3 ounces |
| Materials | Cobalt 6 baffles, stainless steel outer tube |
| Finish | Black Cerakote |
| Full-Auto Rated | Yes |
| Barrel Restrictions | None |
| Included Mounting | Xeno system with 1/2-28 flash hider and adapter |
Frequently Asked Questions
What comes in the box with the Sierra-5Xm?
The Sierra-5Xm ships ready to use with the complete Xeno mounting system: a 1/2-28 Xeno flash hider, Xeno adapter, and all necessary tools for installation and adapter changes.
Can I use the Sierra-5Xm on different rifles or change the mounting system?
Yes. The Sierra-5Xm features a HUB-compatible socket (1.375-24") that accepts a variety of mounting adapters. You can swap between different R-Series front caps and adapters as your needs change. The suppressor also has a small hole drilled through the blast chamber allowing you to pin and weld an adapter if desired.
Is the Sierra-5Xm rated for full-auto fire?
Yes, the Sierra-5Xm is fully rated for full-auto use with no barrel length restrictions, making it suitable for military, law enforcement, and professional use, as well as civilian semi-automatic rifles.
What calibers does the Sierra-5Xm suppress?
The Sierra-5Xm is rated for 5.56 NATO and .224 Valkyrie, with an energy rating of 2200+ ft-lbs. It is optimized specifically for the 5.56 platform for sound and flash suppression.
