Yankee Hill Machine Company Black Diamond Carbine XL Features The Yankee Hill Machine Company Black Diamond Carbine XL is chambered in 5.56 and .223 Rem giving shooters the flexibility to run either cartridge through the same rifle. Its 16 inch barrel is threaded to accept muzzle devices letting the owner install a compensator brake or suppressor to suit the intended use. A 1:8 twist rate stabilizes a wide range of bullet weights making the rifle a practical choice whether shooting lightweight varmint loads or heavier match bullets. The semi auto action cycles reliably shot after shot keeping the rifle responsive for both range work and more demanding applications. Feeding from a 30-round magazine the Black Diamond Carbine XL is built for shooters who want extended capacity on tap without having to reload constantly. The Black Diamond series reflects Yankee Hill Machine Company s experience building dependable semi auto platforms bringing that pedigree to this carbine length rifle. A centerfire action in a proven caliber combination makes this rifle a versatile choice for the range training or home defense. This Yankee Hill Machine Company Black Diamond Carbine XL with its threaded 1:8 twist barrel is a solid pick for sale at GrabAGun. Yankee Hill Machine Company Black Diamond Carbine XL Specifications Manufacturer: Yankee Hill Machine Company Model: Black Diamond Carbine XL Caliber: 5.56 / .223 Rem Barrel Length: 16 Twist Rate: 1:8 Capacity: 30+1 Action: Semi Auto Available At: GrabAGun