Phase 5 Weapon Systems M4 / M16 Bolt Carrier Group

Designed for precision and individually HPT and MPI tested, the Phase 5 Weapon Systems® M4 / M16 Bolt Carrier Group (BCG) is manufactured to give you long-lasting field use and dependability with your M4 or M16 style rifle. The heat treated 9310 steel and chromed lined bolt carrier features a corrosion-resistant phosphate coating for superior strength and smooth, reliable function. The cam pin ensures safe and proper function when shooting your rifle while the gas key is designed to provide smooth and proper cycling every time you pull the trigger. Order now! Made in USA.