The Sanders Armory Corp AR15/M16 .223/5.56, 300 Black Out Melonite/Nitride BCG offers a 9310 Steel MPI Tested bolt and a 8620 Steel Carrier with a Nitride finish that will not flake off, and produces less friction while increasing the life of the BCG. The bolt carrier groups are processed with the QPQ (quench polish quench), a specialized type of nitrocarburizing case hardening which increases corrosion resistance while adding natural lubricity and reduced wear.
The AR15/M16 .223/5.56, 300 Black Out Melonite/Nitride BCG Features:
- 9310 Steel MPI tested bolt
- 8620 Steel Carrier
- Keys are made from 4130 Steel
- Black Nitride Finish on Carrier
- Requires light lubrication for maximum efficiency, easy to clean.
- Includes Crane O ring
- AISI 9310 VAR (vacuum arc remelt) moly, nickel steel
- Beveled locking surface
- Carbon/fouling relief area for high fire rates
- Phosphate per MIL-STD-171
This AR15 high performance bolt is machined to exacting standards in one operation maintaining angular positional accuracy to 0.001 degrees. Produced from AISI 9310 Vacuum Arc Remelt material, the highest purity available, then heat treated to the original MIL specification for case and core hardness. The lead lug surface is beveled for reliable lock-up and a carbon/fouling relief area is added behind the lugs for complete reliability under high failure rates.
NO shipping to Hawaii, Alaska or Canada! NO international shipping all must be within the 48 Contiguous United States! NO APO/PPO/FPO’s, if you have family members here in the 48 US you can ship to them and they can make arrangements for shipping.