Ruger

SR-556 Takedown cold hammer-forged carbonitrided barrel chambered in 300 AAC Blackout. Nitrided finish. 1:7 Twist Rate. Threaded 5/8-24 with Ruger Flash Suppressor. Barrel is assembled with Takedown barrel extension and complete gas block assembly laser engraved with caliber marking. Barrel includes two 300 BLK optimized 30-round magazines laser engraved with caliber marking.