Proof Research Steel .300 BLK 16" 1:8 Twist Carbine Drop-In Barrel 5/8-24 - 100578 (UPC 843068100578)

Proof 100578 .300 BLK 16" carbine drop-in barrel AR steel: bore boss. .300 blackout barrel / Proof – AR15 drop in.

Proof Steel Barrel Features

• .300 Blackout: Sub / super sonic.
• 16" Length: Maneuver master.
• 1:8 Twist: Bullet stabilizer.
• Carbine Gas: Reliable cycle.
• 5/8-24 Threads: Suppressor / brake.
• Drop-In Ready: Easy swap.
• Steel Construction: Durable duty.
• Proof Precision: Group guru.

Proof 100578 .300 BLK Barrel: Barrel Supreme

100578 shoots supreme – barrel supreme. "Proof Steel 300 BLK 16 Carbine Barrel boss!" bosses button. Proof boss.

Barrel Proof 100578 barrel, .300 BLK 16" AR drop in, Proof Research steel 300 blackout, 1:8 twist carbine barrel.

Barrel Specs