The Proof Research PR15 Carbon Fiber Barrel, 338 ARC, 12.00" Threaded Barrel, Stainless/Carbon Fiber brings Proof’s carbon fiber–wrapped technology to the AR-15 platform in a compact, pistol-length configuration. Built around a stainless steel core with a precision carbon fiber sleeve, this 12-inch threaded barrel is engineered for rigidity, heat management, and repeatable accuracy with the .338 ARC cartridge.
Designed for AR pistols and short, maneuverable builds, this barrel’s 1:8 twist rate stabilizes modern .338 ARC projectiles for consistent performance at the range or in appropriate hunting applications. The pistol-length gas system and .750 gas journal support reliable cycling with compatible components, while the 5/8-24 threaded muzzle is ready for brakes or suppressors. Proof Research’s focus on advanced materials and careful engineering results in a barrel that balances lightweight handling with durability and precision-focused craftsmanship.
- Manufacturer: Proof Research
- Model: BBL CF PR15 338ARC 12 Pistol .750 1-8
- Caliber: 338 ARC
- Barrel Length: 12 in
- Gas System Length: Pistol
- Gas Journal Diameter: 0.750 in
- Muzzle Thread: 5/8-24
| __Material | Stainless Steel, Carbon Fiber |
| __Twist Rate | 1:8 |
| __Rifling | Other |
| __Model | BBL CF PR15 338ARC 12 PISTOL .750 1-8 |
| __Caliber | .338 ARC |
| __Capacity | NA |
| __Barrel Length | 12.00" |
| __Optic Footprint | NA |
| __Action | NA |
