Davidson Defense Overrule 6-inch Pistol-Gas 1:7 .300 BLK AR-15 Freefloat M-Lok Handguard Pistol Complete Upper Build

Overrule 6-Inch Pistol-Gas 1-7 .300 BLK AR-15 Complete Upper with 7-Inch M-Lok Handguard and Flash Can

The Overrule 6-inch .300 Blackout AR-15 complete upper is engineered for compact performance and versatility. Featuring a 1-7 twist barrel, the 6-inch length optimizes the .300 Blackout cartridge for enhanced maneuverability in tight spaces. Constructed from durable steel with nitride finish, the barrel is paired with a pistol-length gas system for reliable cycling. The 7075-T6 aluminum upper receiver features M4 feed ramps and anodized finish for durability and corrosion resistance. A 7-inch M-Lok freefloat handguard made from 6061-T6 aluminum allows versatile accessory attachment while maintaining a lightweight profile. This complete upper includes a mil-spec AR-15 M4 charging handle, complete 9310 alloy steel bolt carrier group with nitride finish, .750 micro low-profile gas block, and 5/8x24 steel flash can with anodized finish that minimizes muzzle rise and aids in stealthy handling. This complete upper is designed for performance and reliability.

Key Features

• 6-inch .300 Blackout barrel with 1-7 twist rate and nitride finish
• Steel barrel construction with 5/8x24 thread pitch
• Pistol-length gas system with .750 micro low-profile gas block
• 7075-T6 aluminum upper receiver with M4 feed ramps and anodized finish
• 7-inch M-Lok freefloat handguard made from 6061-T6 aluminum
• 9310 alloy steel bolt carrier group with nitride finish
• Multi-caliber BCG compatible with 5.56, .223, .300, and .350
• Mil-spec AR-15 M4 charging handle
• 5/8x24 steel flash can with anodized finish
• Complete upper includes BCG and charging handle

Perfect For

• AR-15 pistol builders seeking compact .300 Blackout complete uppers
• Shooters who value enhanced maneuverability in tight spaces
• Gunsmiths requiring reliable cycling with pistol-length gas systems
• Close-quarters applications with .300 Blackout cartridge optimization

6-Inch .300 Blackout Barrel with Nitride Finish

The 6-inch barrel is constructed from durable steel with nitride finish for wear resistance and corrosion protection. The 1-7 twist rate optimizes the .300 Blackout cartridge, stabilizing both subsonic and supersonic ammunition effectively. The 6-inch length enhances maneuverability in tight spaces while maintaining reliable performance. The nitride finish provides low-friction operation and extended barrel life. The 5/8x24 thread pitch accommodates standard .300 Blackout muzzle devices including suppressors and flash cans. The pistol-length gas system ensures reliable cycling in this compact configuration with the .750 micro low-profile gas block.

7-Inch M-Lok Freefloat Handguard and Upper Receiver

The 7-inch M-Lok freefloat handguard is made from 6061-T6 aluminum in black, allowing versatile accessory attachment while maintaining a lightweight profile. The freefloat design eliminates contact with the barrel, preserving accuracy during extended shooting sessions. The M-Lok attachment system provides modular mounting capability for lights, grips, and accessories. The handguard extends beyond the 6-inch barrel, providing forward hand placement and accessory mounting space. The upper receiver is made from 7075-T6 aluminum with M4 feed ramps and anodized finish for durability and corrosion resistance.

Nitride Bolt Carrier Group and Flash Can

The complete bolt carrier group is crafted from 9310 alloy steel with nitride finish for wear resistance and low-friction operation. This multi-caliber BCG is compatible with 5.56, .223, .300, and .350 calibers for build flexibility. The mil-spec AR-15 M4 charging handle provides reliable operation. The 5/8x24 steel flash can features anodized finish and minimizes muzzle rise while directing blast forward away from the shooter. This muzzle device aids in stealthy handling by reducing side blast common in short-barrel configurations.

Complete Upper Assembly

This complete upper is designed for performance and reliability in compact .300 Blackout configurations. The assembly includes all necessary components for immediate installation, including 6-inch nitride barrel, pistol-length gas system, 7-inch M-Lok handguard, upper receiver, bolt carrier group, charging handle, and flash can. The Overrule complete upper optimizes the .300 Blackout cartridge for enhanced maneuverability in tight spaces.

Follow safe handling practices and manufacturer instructions at all times.

Ensure compliance with all applicable laws.

Verify proper installation and function before use.

Confirm secure installation of all components before operation.