M16 Bolt Carrier Group

• Milspec Carpenter No. 158® steel bolt
• Shot Peened Bolt
• 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
• 223/5.56/300 Blackout