GREEN MOUNTAIN GM-M6 FLUTED 16″ 5.56MM NATO M4 A/R BARREL w/ EXTENSION

Description

5.56 NATO Green Mountain 16″ FLUTED M4 type AR Barrel, 4150 vanadium alloy milspec steel, Phosphated finish, Chromed bore and chamber for optimum performance and durability, button rifled, thermo-stress relieved, air gaged, modern 1:7 twist, muzzle threaded 1/2 – 28 .750 gas block with drilled gas port, M4 extension with m4 feed ramps, weighs 1.75 lbs, and has a carbine length gas block.  Barrel is not pinned for front site.