Noveske Stainless Lo-Pro Gas Block 300BLK AR-15 Barrel - 10.5" w/ HS Bolt

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. Specifications: 10.5" 300 Blackout 416R Stainless with 1:7 twist Individual serialized barrel for QC purposes Hand polished SAAMI 300 Blackout Chamber Pistol gas tube included Noveske marked gas block: Low profile, .750" journal, pinned to barrel M4 barrel extension w/extended hand polished feed ramps 60 degree muzzle crown Bead blasted finish 5/8"x24 muzzle threads Weight is 22oz Includes Headspaced Bolt