7.5" 338 Arc 4150 Medium Pistol Barrel 1:5 Twist - 338ARCP7.5MED50B5
Out of stock
Upgrade your AR-15 pistol build with the 7.5″ 338 ARC 4150 Medium Pistol Barrel 1:5 Twist, engineered for precision and reliability in compact configurations. This high-performance barrel delivers exceptional accuracy and velocity for .338 ARC cartridges, making it ideal for close-quarters shooting, home defense, or suppressed setups. Crafted from durable 4150 steel with a rugged nitride finish, it withstands rigorous use while maintaining tight tolerances for consistent shot placement.
Key Features
- Compact 7.5-Inch Length: Perfect for pistol-length AR-15 platforms, offering maneuverability without sacrificing ballistic performance.
- 1:5 Twist Rate: Optimized for stabilizing heavier .338 ARC bullets (up to 300 grains), ensuring superior accuracy and reduced bullet yaw for reliable terminal ballistics.
- Nitride/Melonite Finish: Provides corrosion resistance, reduces friction for smoother operation, and extends barrel life under high-volume fire.
- Pistol Gas System: Balances reliable cycling with minimal recoil, ideal for suppressed applications to keep your setup lightweight and controllable.
- 5/8×24 Muzzle Threads: Compatible with a wide range of muzzle devices, flash hiders, and suppressors for customized configurations.
Specifications
- Material: 4150 Chrome-Moly Vanadium Steel
- Barrel Profile: Medium
- Cartridge Compatibility: .338 ARC
- Gas Block Journal: 0.750 inches
- Gas System Length: Pistol
- Platform: AR-15
- Muzzle Thread Pattern: 5/8×24
- Overall Dimensions (Packaged): 9.5″ L x 3″ W x 3″ H
Why Choose This Product
This barrel addresses common challenges in short-barreled AR-15 builds, such as gas system reliability and bullet stabilization. The fast 1:5 twist excels with subsonic and supersonic .338 ARC loads, delivering flatter trajectories and better energy retention compared to slower twists. Its medium profile strikes a balance between weight savings and heat dissipation, preventing overheating during extended sessions. Whether you’re building a dedicated suppressor host or a versatile PDW, this barrel enhances your setup’s performance, ensuring every round counts. Built to mil-spec standards, it integrates seamlessly with standard AR-15 components for hassle-free assembly.
Don’t miss the chance to elevate your AR-15 pistol with this precision-crafted barrel. Order now and experience the difference in compact firepower.
Frequently Asked Questions
Q: Is the 1:5 twist suitable for all .338 ARC bullet weights?
A: Yes, the 1:5 twist is ideal for heavier bullets (225-300 grains) commonly used in .338 ARC, providing optimal stabilization for both supersonic and subsonic loads.
Q: Will this barrel work with my existing AR-15 upper?
A: Absolutely, it’s designed for standard AR-15 platforms with a 0.750-inch gas block journal, ensuring compatibility with most low-profile gas blocks and uppers.
Q: How does the nitride finish benefit my build?
A: The nitride treatment enhances durability, resists corrosion, and improves accuracy by reducing barrel fouling, making it perfect for tactical or hunting applications.
| Weight | 16 oz |
|---|---|
| Dimensions | 9.5 × 3 × 3 in |
| Finish | Nitride / Melonite |
| Barrel Profile | Medium |
| Cartridge Compatibility | .338 ARC |
| Gas Block Journal | 0.75 |
| Barrel Length | 7.5 |
| Gas System Length | Pistol |
| Platform | AR-15 |
| Twist Rate | 1:5 |
| Muzzle Thread Pattern | 5/8×24 |
| MPN | 338ARCP7.5MED50B5 |
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.
