Microbest

*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 finest manufacturers...

***In Stock Soon***   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...

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...

Limited Run 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...

***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...

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...