Microbest Full-Auto M16 Bolt Carrier Group, Chrome & Phosphate Extractor
The Microbest Bolt Carrier Group is the measuring stick by which all others are compared.
Microbest is the OEM manufacturer and supplier of bolt carrier groups for a lot of popular rifle manufacturers, including but not limited to, Bravo Company Mfg and Sons of Liberty. Microbest is trusted to build a bolt carrier group that exceeds the MIL requirements from the right materials and processes with great attention to detail.
Assembled with Sprinco springs and inserts for longevity and reliability.
Specifications:
Bolt Assembly:
- Bolt precision machined from Carpenter 158 alloy and vibratory tumbled
- Heat-treated and shot-peened
- Individual high pressure/proof (HP) and individually magnetic particle inspection
- Extractor from 4340, heat-treated and shot-peened, manganese phosphate finish
- Ejector from S7 tool steel, heat-treated and shot-peened
- Hard chrome-plated finish
Carrier:
- Machined from AISI 8620 steel
- Full-auto M16 profile
- Heat treated and Carburized/strain relieved
- Precision ground gas key interface
- Gas key from 4130 steel, secured with staked Grade 8 fasteners
- Hard chrome-plated finish
Misc:
- Cam pin from 4340 chromoly steel, heat-treated
- Firing pin from 8640 steel alloy, heat-treated, hard-chrome plated
- Firing pin retaining pin from 1038 carbon steel, heat-treated
Click here to browse our entire selection of Bolt Carrier Groups & Parts.
DAMOND D. (verified owner) –
Good BCG. Really tight fitting and requires break-in period. Mine started running fine after around 20 rounds. Highly recommend.
(verified owner) –
Seems to be good quality,I have not shot it yet but I am pleased with it
Robbie R. (verified owner) –
Shipped very quick. BCG smooth. will be getting these for future builds.
Emma O. (verified owner) –
New favorite shop new favorite bcg. I’ve got one more to get to reconfigure all my setups.
So far, it works great with a Centurion CMoV barrel.
Anthony R. (verified owner) –
Can’t help myself. Bought my 4th one. I will point out, None of the bolts are marked “HPT”!
Only way to improve it, use O.C.K.S.!