These are high grade Bolt Carrier Groups Made in USA.
Specifications and Features
- Nitride Finished by H&M Inc
- 9310 Steel, MPI (Magnetic Particle Inspected) Bolt, Ground per True Mil Spec Specs
- 8620 Carrier (M16 full shroud) Heat Treated, Case Hardened Steel, Ground after Heat treat to Mil Spec Specs,
- Billet Gas Key Hardened to USGI Specifications
- 17-4 H900 Stainless steel Firing pin
- Grade 8 Hardened Fasteners
- Gas Key Staked Per Mil-Spec
- Tool Steel Extractor
