NBS Bolt Carriers Gun Parts
(3 deals total)

  • Bolt Carriers
  • NBS

Filter NBS Bolt Carriers Gun Parts

4 weeks ago
- Machined from Carpenter Technology No. 158 alloy. - Heat treated - Shot peened per ASTM B851/SAE AMS2430S - Individually High Pressure Tested (test fired) - Individually Magnetic Particle Inspected - Manganese Phosphate Finish Extractor - Tool Steel Extractor - Manganese Phosphate Finish - Mil-Spec O-Ring Carrier - Machined from AISI 8620 aircraft qualty alloy per ASTM A108/A322-13 - Full Mass M16 Profile - Stress Relieved - Hard Chrome Bore Gas Key - Machined from 4130 chromoly steel alloy per ASTM A108/A322-13 - Grade 8 Hardware - Properly Staked - Hard Chrome Internal
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3 months ago
Technical Specs: • Gas system: Direct Impingement • Caliber: 5.56x45mm NATO/.223 Rem, .300 Blackout • Finish: Salt Black Nitride • Bolt: 9310 Alloy Steel (High Hardness) • Carrier: 8620 Aircraft Grade Steel • Extractor: Shot Peened and Case Hardened D2 Tool Steel • Firing Pin: Mil-spec 8740 steel with hard chrome finish • Gas Key: Mil-Spec w/ properly staked Grade-8 screws & Permatex No. 3 sealed • Cam Pin: 8620 Steel w/ Black Nitride Finish • Quality Control: MPI Inspected for QC ADDITIONAL INFORMATION WEIGHT 0.0000 oz BOLT FINISH
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5 months ago
NBS Nickel Boron Bolt Carrier Group for .223/5.56/300BLK Carrier M16 style (Auto) Machined from 8620 tool steel Heat treated to mil spec Bolt Machined from 9310 tool steel Heat treated to military specifications Shot Peened MPI (Mag Particle Inspected) Gas Key Machined from 17-4 Stainless Steel Heat treated to mil spec Extractor Machined from S-7 shock resisting tool steel Heat treated to mil spec Shot peened Extractor spring is made of stainless steel music wire Firing Pin Machined from 17-4 stainless steel Heat treated to milspec Specifications Weight: 11.6 oz
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