AO Precision True Mil-Spec SP/HPT/MPI 5.56 Bolt Carrier Group - $79.95 (Free S/H over $175)

Description

Description
Right here is a True Mil-Spec BCG. Each and every bolt, test fired from the factory. 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. 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
- Manganese Phosphate Finish
Extractor
- 4140 Steel per ASTM A108, cold drawn and stress relieved BHN 187-22
- Manganese 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
- Hard Chrome Bore
Gas Key
- Machined from 4130 chromoly steel alloy per ASTM A108/A322-13
- Grade 8 Hardware
- Properly Staked
- Hard Chrome Internal
- Permatex sealed
Weight 0.0000 oz Bolt Finish
Mag Phosphate
Bolt Material
Carpenter 158 Steel
Cartridge Compatibility
.223/5.56 NATO/.300 BLK
Finish
Mag Phosphate
Carrier Profile
M16
High Pressure Tested
Individually HP Tested
Magnetic Particle Inspected
Magnetic Partical Inspected
Platform
AR-15
MPN
BCG556
Brand
nbs
SKU: 4494