Proof Research AR-Type Barrel 11.50" for AR-Style, Stainless - 100387

Proof Research AR-Type Barrel 11.50" for AR-Style, Stainless - 100387. This stainless AR-type barrel uses CAMGAS caliber-matched gas system to fine-tune gas pressure for different cartridges and barrel lengths, delivering improved accuracy, reduced recoil, and reliable extraction under high chamber pressures. Designed for 11.50 inch AR-style rifles, suitable for 5.56x45mm NATO and .223 Remington, with AR compatibility.