A solid Bolt Carrier Group is a key component of your Ar15. Microbest produces top quality mil-spec BCGs for the military and other quality rifle manufacturers. This 5.56 / 223 BCG features a phosphate exterior coating, chrome lined interior, and is properly made, ready to run reliably in your rifle.
Mil Spec 8620 Carrier, Chrome Lined
- 8620 Quality Steel
- Full Auto M-16 cut
Mil-Spec Bolt , Phosphate
- Carpenter 158 Steel (c158)
- Shot Peened
- High Pressure Tested (HPT)
- Magnetic Particle Inspected (MPI)
Mil Spec Extractor – Phosphate
- Phosphate extractor has more friction when gripping the case rim, allowing for more reliable extraction.
- 4140 Steel
- Extractor Spring by Sprinco
- Black Extractor Insert and Oring
Mil Spec Gas Key, Phosphate
- 4130 Steel
- Grade 8 Hardware
- Properly Staked
4140 Steel Cam pin,
Firing Pin, retaining pin
Weight: 11.6oz
Awesome part, great vendor – Best price online, and quick shipping. Plus nice coozie and stickers!
The Closest Thing To A Maintenance Free BCG – I have owned a dozen different BCG’s and this one is by far the lowest maintenance BCG I own. I have chrome, TiN, Parkerized, Cerro etc. This BCG has the best coatings in the right places to make it very dependable, and very low maintenance of ALL the bolts I have owned so far. Parkerized on the carrier and ejector which holds the lubrication and, chrome plated inside where the bolt rides to shed dirt and debris and keep the gas ring area holding a tight seal. The gas contact area is also chrome plated for a tight seal and no sticking due to fouling. It’s the perfect combination of low maintenance and low wear! Get yours and never worry about your BCG EVER!!!!!!!!!!!
Great BCG !!! – Great BCG for the money. Gauged out very gas efficient (SOTAR Specs) with upgraded OCKS carrier key fasteners and Springco ejector and extractor springs. Combine that with chrome lined bolt run area and internal carrier key area (and a tested bolt) it should s a great bolt. Will buy more as needed
Best all around – Holds lubricant, well crafted, solid pedigree
Microbest Phosphate BCG – Have not used it yet but looks to be a very quality product. Very good finish, no machine marks. Very fast shipping as well.