AR-15 Bolt Carrier Group, 5.56, Black Nitride
A black nitride bolt carrier group for 5.56 AR-15 builds, built around an MPI (magnetic particle inspected) Carpenter 158 steel bolt. The 8620 heat-treated carrier is polished and black nitride coated, the firing pin is shot peened, and the gas key is secured with grade 8 hardened fasteners and staked per mil-spec.
Features
- Bolt: MPI (magnetic particle inspected) Carpenter 158 steel, black nitride
- Carrier: 8620 heat treated, polished with black nitride coating
- Firing pin: Shot peened
- Fasteners: Grade 8 hardened
- Gas key: Staked per mil-spec
- Platform: AR-15 / 5.56
- SKU: JLB-AR15-BCG-BN
Returns and Warranty
No returns are taken on bolt carrier groups. If defective, we will arrange shipment and return to the manufacturer representative for inspection, repair or replacement. Void if fired with reloads or if the rifle is not assembled by a manufacturer or gunsmith.
Other BCG Options
Want to save weight? See the 5.56 titanium bolt carrier group. Building a .308 or 9mm? See the .308 nickel boron BCG and the 9mm BCG.
3 Reviews Hide Reviews Show Reviews
-
Great bcg
One of the best BCG I have bought really slick
-
Nice finish
Finish and milling looks great Unfortunately it did not come with a 158 carpenter bolt but instead as 9310
-
Jimi does it again.
Bought this to upgrade a PSA bcg I had bought for another build. Flawless in its action.
