NBS True Mil-Spec SP/HPT/MPI 5.56 Bolt Carrier Group Black Nitride - $74.95

Description

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
- Machined from AISI 8620 aircraft quality alloy per ASTM A108/A322-13
- Full Mass M16 Profile
- Stress Relieved
- 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.
Weight 0.713 oz Bolt Finish
Mag Phosphate
Bolt Material
Carpenter 158 Steel
Cartridge Compatibility
.223/5.56 NATO/.300 BLK
Finish
Salt Bath Nitride
Carrier Profile
M16
High Pressure Tested
Individually HP Tested
Magnetic Particle Inspected
Magnetic Partical Inspected
Platform
AR-15
MPN
5877
Brand
nbs
SKU: 5877