AO Precision C158 SP/HPT/MPI 5.56 Bolt Carrier Group Black Nitride - 5877

Save 41 % MSRP: $169.95 $99.95

In stock

AO Precision C158 SP/HPT/MPI 5.56 Bolt Carrier Group Black Nitride quantity

>> ADD PRODUCT 1843585 TO CART <<

This product appears in the following bundles / configurators

• NBS AR-15 5.56/.223 Pistol Kit Configurator
• NBS AR-15 5.56/.223 Rifle Kit Configurator
• AR-15 .223/5.56 Rifle Kit Configurator
• AR-15 .223/5.56 Complete Upper Configurator

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

Compliance

NFA (National Firearms Act) compliance is crucial for legal ownership and transfer of regulated firearms and accessories like short-barreled rifles, suppressors, and certain types of ammunition, ensuring adherence to federal regulations to avoid legal penalties and ensure responsible firearm ownership.

Please select an FFL from the table below, if you do not see your desired FFL, click "Set Later" and you will be able to enter your FFL's information after checkout.