Brand: NBS
AO Precision C158 SP/HPT/MPI 5.56 Bolt Carrier Group Black Nitride - 5877
Save 35 %
MSRP: $169.95
$109.95
In stock
SKU: 5877
Categories: AR-15 BCGs, Bolts, Carriers & BCGs (Bolt Carrier Groups)
Description
AO Precision has provided BCGs to large military contractors such as FN America and large commercial retailers who re-brand and sell these at a considerable mark-up. You can now get these directly from AR15Discounts.com and save big!
Bolt
- Machined from Carpenter Technology No. 158 alloy.
- Heat treated
- Shot peened per ASTM B851/SAE AMS2430S
- Individually High Pressure Tested (test fired)
- HP proof testing, 100% using a high pressure M197 or SAAMI commercial equivalent, without evidence of failure
- Individually Magnetic Particle Inspected after Initial Test Fire
- Black Nitride Finish
Extractor
- 4140 Steel per ASTM A108, cold drawn and stress relieved BHN 187-22
- Phosphate Finish
- Extractor Spring
- Black Extractor Insert
- Viton 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
Additional information
Weight | 11.408 oz |
---|---|
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 |
Bolt Finish | Mag Phosphate |
MPN | 5877 |
UPC | 5877 |