Bolt Carrier Groups

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...

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 AR-15 RIFLES, 22LR AR-15 CONVERSION KITS AND...

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 maintaining and upgrading firearms. The durability,...

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 for Glock or Colt magazines. All critical parts are...

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 dry lubricity, extreme durability and increases both...

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 Finish, 223/556 Built from 8620 Steel, heat treated...

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 Carrier Interior, Chrome Lined Gas Key, Staked Gas Key...

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. For Left Side Ejecting Uppers Nickel Boron...

This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec AR10 upper receivers. All critical parts are coated with EXO Nickel Boron technology that provides permanent dry lubricity, extreme durability and increases both...

Colt's Manufacturing, Mil-Spec Bolt Carrier Group, 223Rem/556NATO, Black Parkerized Finish Parkerized Mil-Spec .223/556 *These have an etched "C" on the Carrier, not the best visibilty, this how they were received from Colt.*

Machined from 4140, Nitride Coating, MIL-SPEC configuration, Staked MIL-SPEC Gas Key, Full Auto Rated. Bootleg, 5.56 Lightweight Bolt Carrier Group, Machined from 4140, Nitride Coating, Mil Spec Configuration, Staked Mil Spec Gas Key Nitride...