PSA AR-15 complete MPI bolt assembly, made of carpenter 158 steel, shot peened. Fully machined 8620 steel extractor, black extractor insert. Mil-Spec Manganese Phosphate finish, …

Feb 25, 2021 · Bolt carrier group (auto version) for your AR15, M16, or M4. Parkerized exterior and chrome lined inside carrier. Machined to USGI specifications. This M16/M4 carrier …

Feb 25, 2021 · BCM® (HPT & MPI) Bolt Assembly. The BCM bolt assembly is machined from the correct Milspec Carpenter No. 158 steel, shot peened for increased strength, includes tool …

Our M16 / AR bolt completion kit comes with everything you'll need to finish your rifle's AR15, M4 or M16 Carrier. This premium backup bolt is a 9310 MPI spare bolt that perfectly fits the M16 …

AO Precision has provided BCGs to large military contractors such as FN America and large commercial retailers who re-brand and sell these at a considerable mark-up. You can now get …

AR-15 Nickel Boron Bolt Assembly - MPI C158 This back up AR15 Bolt Assembly is MPI inspected and comes plated in NiB coating which offers a high-lubricity for drastically reduced …

Precision machined assembled Ar15 bolt face, with DLC Diamond Like Carbon coating. The DLC has good hardness, durability, and low friction. Always a good idea to have a few spare bolts.

Genuine USGI Production, NOT inferior commercial grade. We've seen just about everything out there & this is the finest BCG made. Legal and recommended in AR-15s.SPECS - 158 …

Sons of Liberty Gun Works Bolt Carrier Group HPT/MPI Bolt: Precision machined from Carpenter Technology No. 158 alloy, Heat treated per mil-spec, Shot peened per… Manufactured to …

M16/AR15 Bolt - 9310 MPI (5.56) - Phosphate. This is a complete bolt finished in Phosphate. This premium backup bolt is a 9310 MPI spare bolt that perfectly fits the M16 and AR15 carriers …