Proof Research Steel Drop In Barrel AR15 300 Blk 16 Inch 1 8 Twist 5 8 24 Threads CAMGAS

The Proof Research drop-in barrel for AR-15 compatible firearms, crafted in steel for 16" 1:8 twist barrels with 5/8-24 threads and chambered in 300 BLK, combines purpose-built engineering with proven reliability to deliver a smoother, more controllable shooting experience. Built around Proof's Caliber Matched Gas System (CAMGAS), this barrel is tuned for the cartridge and length, maintaining gas pressures near those the platform was originally designed to handle, even as higher performance cartridges demand more from the bore. The result is a softer recoil impulse, reduced fouling in the receiver, and improved extraction reliability, allowing you to stay on target and maximize accuracy with advanced rounds while reducing wear on brass components. This drop-in barrel integrates seamlessly into carbine gas system builds, enabling shooters to harness the benefits of modern performance without sacrificing simplicity or reliability. Ideal for precision work, hunting, or tactical applications, Proof Research's design philosophy centers on optimizing gas dynamics and barrel integrity to deliver consistent, repeatable performance across the AR platform.