Bolt Carrier Groups

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...

***In Stock***   The Ultimate Hard-Use 5.56 Bolt Carrier Group: These aren't designed to be pretty. They're not meant to compete with the gorgeous museum-quality $200+ units that other...

DLC Finish on Outer Wear Surfaces, Phosphate Extractor and Phosphate/CL Gas Key with OCKS Carrier Key Screws.  Microbest is one of the finest manufacturers of mil-spec bolt carrier groups for the...

Now w/ OCKS Carrier Key Screws Microbest is one of the finest manufacturers of mil-spec bolt carrier groups for the military and small arms manufacturers. These are individually High Pressure Tested...

***Does Not Include Carrier*** Mil-Spec Bolt - CHROME C158 Steel Shot Peened High Pressure Tested (HPT)  Magnetic Particle Inspected (MPI) *Ejector is either Chrome or Phosphate Chrome Silicon...

***Cosmetic Blemish*** These are the same spec as our ALL-CHROME w/ PHOSPHATE EXTRACTOR BCGS. They will function properly 100% of the time but may exhibit cosmetic irregularities.    These have...

Please Read: This is for either the M-16 spec BOLT KIT alone, or the M-16 spec CARRIER alone, each in DLC finish. DLC Finish on Outer Wear Surfaces, Phosphate Extractor and Phosphate/CL Gas Key with...

***Cosmetic Blemish*** These are the same spec as our PREMIUM BCGS. They will function properly 100% of the time but may exhibit cosmetic irregularities.    The Ultimate Hard-Use 5.56 Bolt Carrier...

Microbest is one of the finest manufacturers of mil-spec bolt carrier groups for the military and small arms manufacturers. We recommend degreasing and lubricating before installation. Ships in OEM...

Limited Edition You may already be familiar with our original Super-Stakes in Chrome. These are based on our Phosphate+ except instead of the factory staking that most of our BCGs receive, we asked...

Introducing the 1K3 Bolt Carrier Group. Guaranteed for Life. M16 profile Bolt Carrier Groups, these are hand inspected and given a heavy duty custom stake before being laser branded with the 1K3...

Limited Edition These are the same BCGs as our Premium Chrome, but we went one step farther. Instead of the factory staking that most of our BCGs receive, we asked our fellow San Antonio AR-tist (did...

Limited Run w/ OCKS Carrier Key Screws Nitride BCGs without OCKS can be found here Microbest is one of the finest manufacturers of mil-spec bolt carrier groups for the military and small arms m

*Back in Stock Soon*   These have Mil-Spec Carrier Key Screws. If you prefer the Premium Variant (upgraded w/ OCKS Carrier Key Screws), Click Here. Microbest is one of the fines

Microbest is one of the finest manufacturers of mil-spec bolt carrier groups for the military and small arms manufacturers. These are individually High Pressure Tested and then undergo a Magnetic...

NOTE: All BCM bolt carrier groups are factory test fired. The BCG may show handling marks consistent with these quality control procedures.The Bravo Company Manufacturing Bolt Carrier Group, with a...

The Daniel Defense M16 Cut Complete Bolt Carrier Group is a MIL-SPEC, full auto compatible, M16 profile bolt carrier group assembly. The 8620 steel carrier and Carpenter 158 steel bolt assembly have...