Proof Research AR-15 Barrel, Stainless Steel .223 Wylde 18" 1:7 Twist 1/2-28 - 101636

Stainless steel drop-in barrel for AR-15 compatible rifles chambered in .223 Wylde with an 18" length and 1:7 twist rate. Features Proof Research's Caliber Matched Gas System (CAMGAS) tuned specifically for the cartridge and barrel length to improve performance and reliability. Threaded muzzle with 1/2-28 pitch for direct mounting of muzzle devices.