Spike's Tactical Spikes 556, Semi-automatic Rifle, 223 Remington/556 NATO, 16 Barrel, Cerakote Finish, Rose Gold, Mid Length Gas System, 13 Free Float M-LOK Rail, No Magazine STR5735-CM3F-PRG Spike's complete rifles are built to strict standards, inspected by their professionally trained armorers, then test fired for final functions check.