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

Our primary emphasis has been on improving the performance and reliability of the AR platform through innovative barrel designs. The implementation of the caliber matched gas system (CAMGAS) allows us to finely adjust the gas system to match each cartridge and barrel length. While the AR-15 and AR-10 were originally optimized for 223REM, 5.56x45mm and 308 win/7.62 NATO rounds, the introduction of higher-performance options like the 22 Nosler and 6.5 Creedmoor has increased bore pressure further