5" 300 BLACKOUT MICRO PISTOL MED PROFILE 1:5 RH TWIST M4 BARREL EXTENSION 4150 CrMoV BLACK NITRIDE FINISH - 300MP5MED50B5

Discover the ultimate in compact firepower with our 5″ 300 Blackout Micro Pistol Barrel, engineered for AR-15 platforms seeking superior performance in close-quarters scenarios. Crafted from premium 4150 CrMoV steel and finished with a durable black nitride coating, this barrel delivers exceptional accuracy, reliability, and corrosion resistance, making it the go-to choice for tactical enthusiasts building suppressed pistols or personal defense weapons (PDWs).

Key Features

• Optimized 1:5 RH Twist Rate: Stabilizes both supersonic and subsonic 300 Blackout rounds for consistent bullet performance, ideal for suppressed shooting where heavy subsonic projectiles excel.
• Micro Gas System: Ensures smooth cycling in ultra-short configurations, reducing recoil and improving control during rapid fire—perfect for maneuverability in tight spaces.
• Medium Profile Design: Balances weight at just 12 oz with rigidity, preventing barrel whip for enhanced precision without adding unnecessary bulk to your build.
• Black Nitride Finish: Provides superior wear resistance and lubricity, extending barrel life and simplifying maintenance even in harsh environments.
• M4 Barrel Extension: Guarantees reliable feeding and extraction, compatible with standard AR-15 bolt carrier groups for seamless integration.

Specifications

• Barrel Length: 5 inches
• Caliber: 300 Blackout (300 BLK)
• Material: 4150 Chrome Moly Vanadium (CrMoV)
• Twist Rate: 1:5 Right Hand
• Gas System: Micro
• Gas Block Journal: 0.750 inches (dimpled for secure mounting)
• Muzzle Threads: 5/8×24—ready for your favorite muzzle device or suppressor
• Finish: Black Nitride (Melonite/QPQ equivalent)
• Platform: AR-15
• Weight: 12 oz

Why Choose This Product

In the world of tactical firearms, every inch matters. This 5″ 300 Blackout barrel addresses common pain points like excessive recoil in short-barreled setups and unreliable cycling with subsonic ammo. Its fast 1:5 twist maximizes the cartridge’s versatility, delivering devastating terminal ballistics at short ranges while maintaining sub-MOA potential for precision shots. Whether you’re customizing a pistol brace build or a compact SBR, this barrel enhances controllability and quiet operation when paired with a suppressor, solving the challenges of gas blowback and over-gassing in micro-length systems. Built to withstand rigorous use, it offers peace of mind for shooters who demand reliability without compromise.

Elevate your AR-15 build today with this high-performance 300 Blackout pistol barrel. Order now and experience the difference in compactness and power that sets your setup apart from the rest.

Frequently Asked Questions

Is a 1:5 twist rate suitable for 300 Blackout ammunition?

Yes, the 1:5 twist is specifically optimized for 300 Blackout, providing excellent stabilization for heavier subsonic bullets (e.g., 200-220 grain) commonly used in suppressed applications, while still handling supersonic loads effectively.

What gas system does this barrel use, and is it suppressor-ready?

This barrel features a micro gas system, designed for ultra-short barrels. It’s highly compatible with suppressors, but tuning the gas block may be necessary to optimize cycling and reduce gas to the face.

Will this barrel fit my standard AR-15 upper receiver?

Absolutely, it includes an M4 barrel extension for direct compatibility with AR-15 uppers, bolts, and carriers. Ensure your gas tube and block match the 0.750″ journal diameter.