Bolt Carrier Group

• Mil-Spec 8620 Tool Steel M16 Bolt Carrier with Shrouded Firing Pin
• Carrier is 5.3.1.2 MIL-STD-171 Phosphate Coated inside and out with 1.2.2.2 MIL-STD-171 Hard Chrome Bore
• Laser Engraved with ST Spider Logo
• Mil-Spec Tool Steel Carrier Key
• Carrier Key is 5.3.1.2 MIL-STD-171 Phosphate Coated inside and out with 1.2.2.2 MIL-STD-171 Hard Chrome Bore
• Carrier Key is installed with Grade 8 Hardware and Properly Staked
• Bolt is CNC Machined from Carpenter-158 Steel
• Bolt is 5.3.1.2 MIL-STD-171 Phosphate Coated inside and out
• All Bolts are Shot Peened per current Mil-Spec Requirements
• All Bolts are Individually High Pressure Tested (HPT) and then Individually Magnetic Particle Inspected (MPI)
• Tool steel Extractor is Shot Peened, 5.3.1.2 MIL-STD-171 Phosphate Coated, Fitted with a Mil-Spec Black Extractor Spring Insert and Mil-Spec Viton O-Ring
• Mil-Spec Firing Pin with 1.2.2.2 MIL-STD-171 Hard Chrome Finish
• Mil-Spec Cam Pin with 5.3.1.2 MIL-STD-171 Phosphate Coating
• Mil-Spec Firing Pin Retaining Pin with 5.3.1.2 MIL-STD-171 Phosphate Coating