Hi, I'm about to buy my first ar15 bolt carrier group. It is really hard to find one if any right now and I have found one in stock and would like to know why the carrier is 8620 and the bolt is Carpenter 158-Case hardened. Isn't the carrier suppose to be Carpenter 158-Case hardened as well to be mil spec?
Specs:
Mil-Spec MIL-STD-171 Phosphate Finish
Individually MPI Tested & Stamped
Bolt: Carpenter 158-Case hardened, Shot Peened, and MPI tested.
Carrier: 8620 Tool Steel-(M16 full shroud)-Heat Treated, Case Hardened, & Chrome Lined.
Gas Key: Tool Steel-Attached using Grade 8 Hardened Fasteners, & Staked.
Cam Pin: 4140 Steel
Extractor:Tool steel-shot peened
Extractor Spring:Upgraded Chrome Silicon. Black Buffer & O-Ring for Enhanced Reliability.
Can anyone let me know if this is a good bolt to buy or should I keep looking? Also price is only $119.95.
Thannks
Specs:
Mil-Spec MIL-STD-171 Phosphate Finish
Individually MPI Tested & Stamped
Bolt: Carpenter 158-Case hardened, Shot Peened, and MPI tested.
Carrier: 8620 Tool Steel-(M16 full shroud)-Heat Treated, Case Hardened, & Chrome Lined.
Gas Key: Tool Steel-Attached using Grade 8 Hardened Fasteners, & Staked.
Cam Pin: 4140 Steel
Extractor:Tool steel-shot peened
Extractor Spring:Upgraded Chrome Silicon. Black Buffer & O-Ring for Enhanced Reliability.
Can anyone let me know if this is a good bolt to buy or should I keep looking? Also price is only $119.95.
Thannks