SDT 5.56/300 BLK Bolt Carrier Group (BCG) - Nitride

Information

• M16 cut bolt carrier (8620) with black nitride finish
• 9310 5.56/.223/300 Blackout bolt (9310) with black nitride finish
  • Heat treated, shot peened, MPI
• Staked billet gas key (4140) with black nitride finish
• Cam Pin (4140) nitride treated for wear resistance
• Billet Machined Extractor (4140)
  • heat treated, shot peened, phosphate coated for reliable extraction
  • Extractor insert and O-ring installed
• 17-4 H-900 stainless steel firing pin
• 100% USA Made