CMMG Barrel AR-15 300 AAC Blackout (7.62x35mm) 16.1 Medium Taper Contour 1 in 7 Twist Carbine Gas Port Stainless Steel

This barrel from CMMG is just what you need to build that 300 Blackout upper you’ve been planning.  Made of 416 Stainless steel, it has the fast 1:7″ twist rate needed to stabilize those long heavy 30 caliber bullets.

Notes:

Suitable for use with Subsonic & Supersonic Ammo Suppressed, and Supersonic Ammo Unsuppressed. Cycling issues can occur with some Subsonic Ammo Without a suppressor installed