ARMSLIST - For Sale: NBS True Mil-Spec SP/HPT/MPI 5.56 Bolt Carrier Group

For Sale: NBS True Mil-Spec SP/HPT/MPI 5.56 Bolt Carrier Group – Black Nitride

$ 150

Listed In: Gun Parts

Purchase the NBS True Mil-Spec SP/HPT/MPI 5.56 Bolt Carrier Group – Black Nitride here!

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

Machined from AISI 8620 aircraft quality alloy per ASTM A108/A322-13
Full Mass M16 Profile
Stress Relieved
Hard Chrome Bore
Black Nitride Finish

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.

Take a look at our other AR-15 Bolt Carrier Groups here!

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Our goal is to ship your order within 24 hours and our guarantee is that we will ship within 72 hours (excluding weekends and holidays). This includes upper assemblies. So if you haven't received your tracking number within that 72 hour period, send us an email and we'll refund 5% back to your card for the inconvenience.

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