Enjoy a Blast from the Past with these Phosphate Coated and Chrome-Lined Barrels.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 our Bloodline 16" 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. Barrel Length 16" Barrel Weight 29.97 Oz Barrel Material 4150 CMV Barrel Caliber 5.56 Barrel Profile Socom Twist 1/7 Barrel Thread 1/2 x 28 Gas Block Size .750 Gas System Length Mid-Length Barrel Crown 11 Degree Barrel Finish Phosphate Barrel Extension Finish Phosphate