Bolt Carrier Groups

Bauer Precision 5.56 Firing Pin Standard Firing Pin for all AR15 platform bolt Carriers.  

Bauer Precision 5.56 Firing Pin Retainer  Standard Firing Pin Cotter Key that holds the firing pin in the BCG

Bauer Precision Nitride Cam Pin for a standard 5.56 Bolt and Carrier. 

Bauer Precision 6.5 Grendel MPI Nitride Bolt Assembly  INCLUDES: Bolt Gas Rings Extractor & Spring  

Bauer Precision 5.56 MPI Nitride Bolt Assembly  INCLUDES: Bolt Gas Rings Extractor & Spring  

This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec M16, M4 or AR15 upper receivers. All critical parts are coated with EXO Nickel Boron technology that provides permanent dry lubricity, extreme durability and...

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 that provides permanent dry lubricity, extreme...

This is a Semi-Auto/Full Auto M16 Complete bolt carrier group made with MILSPEC quality steel. It is heat-treated, hard-chromed and chrome-lined in the bolt throat. Sharp edges and rough finishes are eliminated. The HMB Bolt by HM Defense eliminates the...

Rise Armament, Bolt Carrier Group, .223/5.56, Nickel Boron Finish Precise Manufacturing Long Term Reliability Durable Construction High quality components and precise manufacturing make Rise Armament parts ideal for maintaining and upgrading...

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 years of service you can count on. FailZero, M16/M4...

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 resistance. By reducing friction this bolt assembly...

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 finishes eliminated. Young Manufacturing, Inc., M16 Black...