Rosco Manufacturing Stray Dog 5.56 NATO Threaded Barrel Mid-Length Phosphate / Chrome Lined Phosphate 16in. We found Stray Dogs begging for scraps; these leftovers are the last of a large OEM order that we are offering to the public. Great for cloners and purists these barrels share the same features as Bloodline USASOC barrel with 5.56 NATO chamber and mid-length gas but with the classic time-tested and proven mil-spec phosphate coating and chrome-lined bore. Specifications for Rosco Manufacturing Stray Dog 5.56 NATO Threaded Barrel: Manufacturer: Rosco Manufacturing Color: Black Fabric/Material: 4150 CMV Caliber: 5.56x45mm NATO Barrel Length: 16 in Barrel Profile: SOCOM Gas System Length: Mid Length Barrel Twist Rate: 1-7 Gun Make: AR Platform Gun Model: AR-15 Weight: 29.97 oz Gun Type: Rifle Firearms Threads Per Inch: 1/2x28 Country of Origin: USA Package Contents: Rosco Manufacturing Stray Dog 5.56 NATO Threaded Barrel What firearm models does the manufacturer say Rosco Manufacturing Stray Dog 5.56 NATO Threaded Barrel is compatible with? The manufacturer says that Rosco Manufacturing Stray Dog 5.56 NATO Threaded Barrel is compatible with AR-15Rosco Manufacturing CL-16.25-556-7-M: Stray Dog 5.56 NATO Threaded Barrel Mid-Length Phosphate / Chrome Lined Phosphate 16in