Bolt Carrier Groups

This 7.62x39 Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil-spec upper receivers chambered in 7.62x39. All critical parts are coated with EXO Nickel Boron technology...

High quality components and precise manufacturing make FailZero parts ideal for maintaining and upgrading firearms. The durability, reliability and excellent build quality of these parts will ensure...

This fully assembled and NiB coated (5.56/.223) bolt assembly is compatible with most mil spec AR15, M16, M4 Carriers. EXO Nickel Boron provides permanent dry lubricity; increased wear and corrosion...

This is a Semi-Auto/Full Auto M16 bolt carrier group made with MILSPEC 8620 quality steel on KE Arms' in-house CNC machines. It is heat-treated and Black Nitride coated. Sharp edges and rough...

CMMG, Mk57 Barrel, 5.7X28MM, 5" Barrel, 1:9 Twist, Black Finish, Includes BCG, Fits AR Rifles Precise Manufacturing Long Term Reliability Durable Construction CMMG IS A LEADING MANUFACTURER OF...

CMC Triggers, Enhanced Bolt Carrier Group, Black Precise Manufacturing Long Term Reliability Durable Construction High quality components and precise manufacturing make CMC parts ideal for...

This 9mm Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most 9mm AR platform rifles and pistols. The FailZero Black Nitride 9mm BCG is compatible with both lowers designated...

This high quality bolt carrier group is a valuable addition to your AR15 build. Features: M16-cut carrier Machined from 8620 Tool Steel (Carrier) and 9310 Steel (Bolt) Carrier has forward assist...

This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec AR15 upper receivers. All critical parts are coated with EXO Nickel Boron technology that provides permanent...

The LUTH-AR complete BCG includes the Bolt Carrier, Carrier Key, Cam Pin and Firing Pin Retaining Pin. (Entire Bolt Carrier Assembly/Extractor Assembly for AR-15) Luth-AR, Bolt Carrier Group, Black...

The LBE M16 Complete Bolt Carrier Group comes assembled and ready to go. Features include: Phosphate 8620 Steel Carrier, Carpenter 158 Bolt (Extractor and Bolt Gas Rings Included), Chrome Lined...

Black Rain Ordnance Left Hand Bolt Carrier Group Nickel Boron Black Rain Ordnance, Inc. is a precision firearms manufacturer specializing in modern sporting rifle designs and high quality accessories...