Barrels
AR-15 .338 ARC 7.5" Pistol Barrel | 1:5 Twist | 5/8-24 | Black Nitride
Build an ultra-compact .338 ARC AR-15 around the Moriarti 7.5" .338 ARC Pistol Barrel. Featuring an aggressive 1:5 twist rate, this short barrel configuration is designed around the heavy-projectile and compact-platform potential that makes .338 ARC especially interesting for short-barreled AR applications.
Manufactured from durable 4150 CrMoV steel, the barrel features a government profile and a corrosion-resistant black nitride finish. The muzzle is threaded 5/8-24, providing a common interface for appropriately compatible .338-caliber muzzle devices and suppressor mounting systems.
At only 7.5 inches, this barrel provides an exceptionally compact foundation for a .338 ARC pistol or properly registered short-barreled rifle configuration. The fast 1:5 twist is a particularly important feature for customers researching short .338 ARC barrels intended around heavy projectiles and lower-velocity applications.
For builders looking beyond traditional 300 Blackout short-barrel configurations, this 7.5" .338 ARC barrel brings the larger .338-caliber cartridge concept to the AR-15 platform in an extremely compact package.
Specifications
| Specification | Details |
|---|---|
| Caliber / Chamber | .338 ARC |
| Platform | AR-15 |
| Barrel Length | 7.5" |
| Twist Rate | 1:5 |
| Profile | Government |
| Muzzle Thread | 5/8-24 |
| Material | 4150 CrMoV |
| Finish | Black Nitride |
| Configuration | Pistol / SBR* |
*Final firearm configuration must comply with applicable federal, state, and local requirements.
Key Features
- Ultra-short 7.5" .338 ARC barrel
- Fast 1:5 twist rate
- AR-15 platform
- 5/8-24 threaded muzzle
- Durable 4150 CrMoV steel
- Government barrel profile
- Black nitride finish
- Designed for compact .338 ARC configurations
- Threaded for compatible muzzle devices and suppressor mounting systems
Suppressor Note
The 5/8-24 muzzle thread does not by itself establish suppressor compatibility. Verify that the specific suppressor and mounting system are manufacturer-rated for .338 ARC, the applicable barrel length, ammunition, and firearm configuration.
What is the advantage of a 1:5 twist in a 7.5" .338 ARC barrel?
A fast 1:5 twist produces greater projectile rotational speed than a slower twist at the same velocity. In an extremely short 7.5" .338 ARC barrel, that can be useful for configurations designed around heavy projectiles and lower velocities. Projectile design and ammunition specifications still matter, so ammunition and component-manufacturer recommendations should always be followed.
Related Products
-11%
