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Complete PSA HPT/MPI PREMIUM 5.56 bolt carrier group.
- Milspec Carpenter No. 158® steel bolt
- Shot Peened Bolt
- High pressure tested (HPT)
- Mag particle inspected (MPI)
- Chrome Lined Carrier (M16 style)
- Chrome Lined Gas Key
- Gas Key Hardened to USGI Specifications
- Gas Key Grade 8 Hardened Fasteners
- Gas Key Staked Per Mil-Spec
- Tool Steel Extractor
- Extractor Spring
- Extractor O-ring Insert
Made in USA. Bolt is made of Mil-spec Carpenter 158 steel, Shot peened, High pressure tested and Mag Particle Inspected. Gas key is machined out of bar stock, chrome lined phosphate coated, and secured with grade 8 fasteners and staked per mil-spec. Bolt carrier is phosphated outside and chrome lined inside. Laser engraved with the PSA logo.
For packaging considerations, BCG will be packed dry. As a result, it will have a grey, dusty appearance that will turn black with the application of CLP or other preferred lubricant.