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 Nickel Boron exterior coating and is properly made, ready to run reliably in your rifle. These are individually HPT / MPI.
Mil Spec 8620 Carrier, Nickel Boron
- 8620 Quality Steel
- Full Auto M-16 cut
Mil-Spec Bolt , Nickel Boron
- Carpenter 158 Steel (c158)
- Shot Peened
- High Pressure Tested (HPT)
- Magnetic Particle Inspected (MPI)
- Sprinco Extractor and ejector springs, with sprinco insert and oring
Mil Spec Extractor – Nickel Boron
- 4140 Steel
- Extractor Spring by Sprinco
- Black Extractor Insert and Oring
Mil Spec Gas Key, Nickel Boron
- 4130 Steel
- Grade 8 Hardware
- OCKS gas key screws
- Properly Staked
4140 Steel Cam pin, Nickel boron
Firing Pin, retaining pin
Weight: 11.6oz
-300x300.jpg "Left Hand Nickel Boron BCG M16 / Ar15 Bolt Carrier Group, photo")
(1)-300x300.jpg "Blem Titanium Nitride TiN M16 / Ar15 MPI BCG 5.56/223, photo")
Nice BCG – Microbest has a good reputation. I haven’t shot it yet (still piecing together the build), but my initial examination has my hopes high. Midstate shipped them fast, and the price was right.
sound of freedom – This was a great set up. I loved being able to customize the set up. Only issue I had was my own fault as a newb to building these. I used a heavy barrel in a slim hand guard. It makes adding attachments tough with clearances. Hoping someday to also get an AR10 from here.