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 Phosphate Finish
Mil-Spec O-Ring
Carrier
Machined from AISI 8620 aircraft quality alloy per ASTM A108/A322-13
Full Mass M16 Profile
Stress Relieved
Hard Chrome Bore
Black Nitride
Gas Key
Machined from 4130 chromoly steel alloy per ASTM A108/A322-13
Grade 8 Hardware
Properly Staked
Hard Chrome Internal
Permatex sealed
Like all NBS parts, this unit is backed by a lifetime warranty.

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