Bolt Carrier Groups

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.*

High quality components and precise manufacturing make Rise Armament 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. Rise Armament,...

The LBE Nickel Boron Complete BCG includes the firing pin, retaining pin, cam pin, extractor and bolt gas rings. Made in the USA. LBE Unlimited, 556 Bolt Carrier Group, Nickel Boron Coated Fits AR-15 Complete NIB BCG Made in the USA

BCG components are NiB-X coated and polished to reduce fouling adherence. Coating is guaranteed for life against chipping, spalling or flaking. Over 30K rounds in Government protocol endurance testing did not wear the coating off. Especially beneficial...

WMD Guns NiB-X .308 DPMS Style Bolt Carrier Group  The NiB-X .308 Bolt Carrier Group provides long life and easy cleaning in the harshest of environments. DPMS compatible. Easy Cleaning and Maintenance Heat Treated Reduced Fouling Adherence

Your Bolt Carrier Group is one of the most critical parts of your build. Don't buy an imitation. This is the Spike's Tactical BCG with Nickel Boron Coating. Nickel Boron Coating Inside and Out (Bolt, Carrier, and Gas Key) Laser Engraved with ST...

LanTac USA Enhanced BCG Full Auto 5.56 Black M16 Full Auto Style for increased mass and lock time.Our BCG is precision machined from 8620 steel with a shot peened bolt manufactured from Carpenter 158 and Magnetically Particle Inspected. The entire...

  The Enhanced Bolt Carrier Group for AR15/M16 platform weapons was designed to minimize carrier tilt and reduce friction inside the upper receiver by relocating key bearing surfaces. All materials, tolerances, and coatings meet or exceed...