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Faxon Match Series 10.5 Gunner 300 BLK AR-15 Barrel (1:8 Twist Pistol-Length Gas) – 416R Stainless — 5R Button Rifling — Gunner Profile — Nitride Inside & Out — NP3 (Nickel Teflon) M4 Extension – The Faxon Match Series 10.5 Gunner 300 BLK delivers match-grade accuracy and fast handling for compact AR-15 builds. The Gunner profile blends Government strength with Pencil agility keeping weight off the muzzle for faster transitions and less fatigue. – Precision-machined from 416R stainless steel with 5R button rifling (1:8 twist) and treated with salt bath nitride inside & out this barrel resists fouling and corrosion while maintaining consistent precision. A Nickel Teflon-coated M4 extension enhances lubricity and tightens the receiver fit for improved consistency. – Key Benefits – Gunner Profile: Government durability with Pencil-like balance for rapid handling. – 1:8 Twist + 5R Rifling: Versatile stabilization for both subsonic and supersonic 300 BLK loads with easier cleaning. – Match-Grade 416R: Stainless steel selected for accuracy and thermal stability. – Nitride Inside & Out: Excellent wear and corrosion resistance for high round counts. – NP3 Extension: Nickel Teflon M4 extension promotes smooth feeding and a precise receiver fit. – Rigorous QC: Stress relieved air-gauge tested MPI inspected and headspace verified in-house. – Specifications – Caliber / Chamber 300 Blackout (300 BLK) – Length 10.5 – Twist Rate 1:8 Right-Hand Twist – Profile Gunner – Gas System Pistol-Length – Material 416R Stainless Steel – Rifling Method 5R Button-Rifled – Finish Salt Bath Nitride (inside & out) – Muzzle Threads 5/8×24 – Gas Block Diameter .750 – Gas Block Journal Length 1.9 – Barrel Extension M4- NP3 (Nickel Teflon) Coated – Weight 1.10 lbs – Crown Recessed 11° Target Crown