SKU: 28894 Our 10.5″ 5.56 Barrel is the perfect addition to your AR15 build. Crafted to mil- spec standards from 4150 Chrome Moly Vanadium with a QPQ corrosion resistant finish, this barrel provides time tested precision and accuracy for your AR15 Carbine length build.. This barrel is HP and MPI tested and includes an F marked FSB. (DOES NOT INCLUDE Front Sight Post) Weight 34 oz Dimensions 10.5 × 2 × 3 in Finish Nitride / Melonite Barrel Profile Government / SOCOM Cartridge Compatibility 5.56 NATO Gas Block Journal 0.75 Barrel Length 10.5