The Faxon Pinned Gas Block 10.5″ 300 BLK Gunner Barrel gives builders a dependable, accuracy-focused barrel with a gas system that won’t budge. With its lightweight-forward Gunner contour, pistol-length gas, and corrosion-resistant nitride treatment, it’s a top choice for compact carbines—especially when running suppressed.
Built from 4150 CMV steel with a nitride finish, this Gunner profile blends Gov’t durability with Pencil-like weight savings for superb handling. Pistol-length gas optimizes function with both supers and subs (especially suppressed), while 1:8 twist stabilizes a wide range of 300 BLK projectiles. Duty-ready construction features 4150 CMV, button-rifled 1:8, and QPQ nitride inside & out, plus stress relief, air-gauge testing, MPI inspection, and headspace verification in-house.
The Faxon 10.5″ 300 Blackout Gunner Barrel with Pinned Gas Block removes the hardest part of short-barrel builds: correctly pinning the gas block. We pre-notch the journal, drill the block, and include the pin—so your gas system won’t shift or loosen under fire. The package includes the barrel, low-profile gas block (hand-tightened for shipping), and retaining pin.
