Sierra 5 XM — Xeno is a dedicated 5.56 can that balances sound, backpressure, and flash while staying compact and hard-use ready. Built with welded Cobalt 6 baffles and a stainless outer tube, it’s HUB (1.375-24) compatible and ships Xeno-ready for fast, repeatable lockup.
Caliber & Energy
- 5.56 NATO, .224 Valkyrie
- Energy rating: 2,200+ ft-lbs
Dimensions
- Length: 4.87" (no adapter), 5.72" (with Xeno)
- Diameter: 1.5"
- Weight: 10.8 oz (no adapter), 13.3 oz (with Xeno)
Materials & Finish
- Cobalt 6 baffles; stainless steel outer tube
- Black Cerakote® body; nitride adapter/mount
Mounting & In-Box
- HUB 1.375-24 rear (mount-agnostic)
- Includes Xeno Adapter, 1/2×28 Xeno Flash Hider, TL Tool Pack
Usage & Ratings
- No barrel length restrictions
- Full-auto rated: Yes
