NBS Bolt Carriers Gun Parts
(3 deals total)

  • Bolt Carriers
  • NBS

Filter NBS Bolt Carriers Gun Parts

1 month ago
Description Right here is a True Mil-Spec BCG. This unit is for builders who prefer tried and true manufacturing and aggressive quality assurance testing over fancy coatings, proprietary profiles and laser engraved logos. Bolt - 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 - Black Nitride Finish - Mil-Spec O-Ring Carrier
6 months ago
Description The NBS AR-15 5.56/.223 Left-Handed BCG is the perfect starting point for our wrong-handed friends. This BCG has one of the best black nitride finishes we have seen, and comes in a mil-spec design with a lifetime warranty. The bolt is made from enhanced 9310 steel while the carrier is made from 8620 tool steel. It is shot-peened and magnetic particle inspected. Included: - Bolt w/ D2 Extractor - Bolt Carrier w/ staked Gas Key - Cam Pin - Firing Pin - Firing Pin Retaining Pin Technical Specs:  - Gas system: Direct Impingement
13 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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