Toolcraft 6.5 Grendel / 6mm ARC Bolt Carrier Group | Black Nitride
The Toolcraft 6.5 Grendel / 6mm ARC Bolt Carrier Group – Black Nitride is a full-auto M16-profile BCG engineered for precision and reliability in AR-15 platforms chambered in 6.5 Grendel or 6mm ARC. Manufactured in the U.S.A. with a 9310 steel bolt and an 8620 steel carrier, this assembly delivers durability, strength, and performance in demanding shooting applications. Each Toolcraft bolt is shot-peened and MPI-inspected to ensure superior structural integrity under pressure.
This Type 2 AR-15 bolt carrier group features a .136″ bolt face depth and a robust 4140 steel extractor assembly with a Mil-Spec O-ring for improved retention and consistent cycling. The 8620 steel carrier is coated in Black Nitride (QPQ), providing excellent lubricity, carbon resistance, and long-lasting protection against wear and corrosion without the flaking or chipping common with phosphate finishes.
The 6.5 Grendel / 6mm ARC bolt carrier group includes a gas key machined from 4130 steel and secured with Grade 8 screws that are properly staked to meet Mil-Spec standards. The cam pin and firing pin are crafted from 8620 and 416 stainless steel, respectively, ensuring reliable cycling and extended component life in a variety of conditions.
Toolcraft is a trusted OEM supplier to the U.S. military and leading rifle manufacturers. Arm or Ally offers genuine, factory-coated Toolcraft BCGs backed by a 100% lifetime warranty. Avoid third-party coated parts that void manufacturer coverage by purchasing authentic Toolcraft products directly from Arm or Ally.
For shooters building or upgrading an AR-15 in 6.5 Grendel or 6mm ARC, the Toolcraft Black Nitride BCG provides a proven combination of reliability, finish durability, and value. Whether used for target shooting, competition, or duty applications, this BCG stands out as a rugged, high-performance component.
- Type 2 bolt face – .136″ depth
- 9310 steel bolt – MPI inspected and shot-peened
- 8620 steel carrier – full-auto M16 profile
- Black Nitride finish – corrosion and wear resistant
- Mil-Spec staked gas key with Grade 8 screws
- Compatible with AR-15 rifles chambered in 6.5 Grendel or 6mm ARC
- Backed by Toolcraft’s 100% lifetime warranty
- Made in the U.S.A.
Product Information
| Manufacturer | Toolcraft |
|---|---|
| Platform | AR15 |
| Caliber | 6.5 Grendel, 6mm ARC |
| Carrier Material | 8620 Steel |
| Bolt Material | 9310 Steel |
| Finish | QPQ Nitride |
| Color | Black |
| Compatibility | Standard AR15 components |
| Features | MPI Inspected, Shot Peened, FA Serrations |
| Made in USA | Yes |
| Weight | 11.52oz |
