Noveske’s 300 AAC BLACKOUT is designed to run optimally firing both subsonic suppressed and supersonic unsuppressed. This barrel is tuned to lock back on the last round using subsonic 220 and 208 grain ammunition with a sound suppressor. The firearm may not lock back with subsonic 220 and 208 grain ammunition without a sound suppressor.
Precision 300 Blackout barrels in 7.94", 10.5", and 12.5" lengths, machined from 416R stainless with a 1:7 twist and hand‑polished SAAMI 300 Blackout chamber. Each barrel is individually serialized for QC, ships with a pistol‑length gas tube, and features a Noveske low‑profile .750" journal gas block pinned to the barrel. M4 extension with extended hand‑polished feed ramps, 60° muzzle crown, bead‑blasted finish, and 5/8"x24 muzzle threads complete the package.
| Barrel Length | Gas System | Barrel Weight |
| 7.94" | Pistol | 21oz. |
| 10.5" | Pistol | 22oz. |
| 12.5" | Pistol | 27oz. |
