Diamondback DB9R 9mm Luger 16in Black Hardcoat Anodize Semi Automatic Modern Sporting Rifle - 32+1 Rounds - This Diamondback DB15 Rifle features a carbine-length, medium 4150 chrome moly barrel, mid-length gas system and a shot-peened Mil-Spec 8620 bolt carrier. It utilizes 15in M-Lok handguard, Magpul MOE-K2 grip, and a Magpul CTR stock. This model has a Diamondback Carbon lower receiver. Made in the USA Threaded Barrel: 5/8 x 24 MOE Grip MAGPUL Moe Stock Diamondback Carbon Lower Receiver A2 .30 Cal Flash Hider