One Horse 7.5" .300 BLK SOCOM Pistol 1:7 M-LOK Complete Upper - OH-CU06

Discover the ultimate in compact firepower with the One Horse 7.5″ .300 BLK SOCOM Pistol 1:7 M-LOK Complete Upper, engineered for tactical enthusiasts seeking reliability and versatility in a short-barrel AR platform. Founded by a U.S. Army veteran, One Horse Firearms delivers 100% American-made quality, ensuring your build stands up to the demands of close-quarters maneuvers, home defense, or suppressed shooting without compromise.

Key Features

• Compact 7.5″ SOCOM Barrel: Crafted from durable 4150 CMV steel with a nitride/melonite finish for superior corrosion resistance and longevity, this government/SOCOM profile barrel optimizes balance and maneuverability in pistol configurations.
• 1:7 Twist Rate: Perfectly suited for stabilizing both supersonic and subsonic .300 Blackout rounds, delivering consistent accuracy across a wide range of ammunition types.
• Pistol-Length Gas System: Enhances reliability with short barrels, reducing recoil and ensuring smooth cycling even in suppressed setups—ideal for those prioritizing quiet, controlled operation.
• 7″ M-LOK Free-Float Handguard: Provides ample rail space for mounting lights, lasers, or grips while maintaining a slim, lightweight profile for agile handling.
• Included Nitride BCG and Charging Handle: Black nitride coating on the bolt carrier group promotes smoother operation and easier cleaning, with a standard charging handle for quick, intuitive use.
• Suppressor-Ready Design: Threaded 5/8×24 muzzle allows seamless integration with your favorite suppressor, unlocking the full potential of subsonic loads for whisper-quiet performance.

Specifications

• Caliber: .300 Blackout (300 BLK)
• Barrel Length: 7.5 inches
• Barrel Material: 4150 CMV Steel
• Finish: Nitride / Melonite
• Profile: Government / SOCOM
• Gas System: Pistol Length
• Twist Rate: 1:7
• Handguard: 7″ M-LOK
• Weight: 50 oz
• Dimensions (L x W x H): 16″ x 3″ x 3″

Why Choose the One Horse .300 BLK Upper?

In the world of short-barrel AR builds, reliability can be a challenge—overgassing, excessive recoil, and inconsistent feeding plague many setups. This One Horse upper addresses these pain points head-on with its tuned pistol gas system and high-quality components, ensuring flawless performance whether you’re running full-auto BCG kinetics or pairing it with a brace for pistol use. Versatile for hunting, training, or tactical applications, it excels in suppressed environments where subsonic .300 BLK shines, offering deeper penetration and reduced signature compared to traditional 5.56 platforms. Built to exceed mil-spec standards, it’s the dependable choice for shooters who demand precision without the hassle of custom tuning.

Elevate your AR pistol build today with the One Horse 7.5″ .300 BLK SOCOM Complete Upper—rugged, ready, and engineered for those who settle for nothing less than excellence.

Frequently Asked Questions

Is this upper compatible with suppressors?

Yes, the 5/8×24 threaded muzzle makes it fully suppressor-ready, optimizing performance with both subsonic and supersonic .300 BLK ammunition for minimal noise and recoil.

What types of ammo work best with this 1:7 twist?

The 1:7 twist rate stabilizes a broad spectrum of .300 BLK projectiles, from 110-grain supersonic rounds for velocity to 220-grain subsonics for suppressed shooting—versatile for any scenario.

Can I use 5.56 components with this upper?

While the upper receiver and most parts are interchangeable with standard AR-15 lowers, always use .300 BLK-specific magazines and ammunition to avoid malfunctions.