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currently ~4 week lead time 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
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