Phase 5 BCG M16/M4 Chrome Lined Phosphate Finish
Phase 5 Weapon Sytems Inc. Mil-Spec M16/M4 Heat treated and chrome lined bolt carrier group. Assembled complete with cam pin, firing pin, bolt and gas key. HPT/MPI tested Bolt. Made in America, on American built machines, with American-built components!
Finish: Standard black phosphate coating
HPT/MPI tested Bolt.
Drop-in, ready to shoot