Warden Enforcer 10.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat Keymod Handguard Pistol Complete Upper Build

Warden Enforcer 10.5-Inch .300 BLK Pistol Complete Upper

This complete upper assembly delivers a proven .300 Blackout platform built for suppressed shooting and close-quarters performance. The 10.5-inch barrel paired with pistol-length gas system cycles reliably with both supersonic and subsonic ammunition. You get a freefloat Keymod handguard, 4150 CrMoV barrel, and USA-made bolt carrier group ready to drop onto any mil-spec AR-15 lower receiver.

Key Features

• 10.5-inch 4150 CrMoV barrel with 1:8 twist rate, phosphate finish, and HBAR profile
• Freefloat 12-inch Keymod handguard for accessory mounting and thermal management
• Pistol-length gas system with low-profile gas block for compact profile
• Complete USA-made bolt carrier group in 9310 alloy steel with nitride finish
• 5/8x24 threaded muzzle with included flash/sound forwarder and crush washer
• M4 feed ramp upper receiver in 7075-T6 aluminum with forward assist and ejection port door
• Mil-spec AR-15 M4 charging handle included

Compact .300 BLK Performance

The 10.5-inch barrel length is purpose-built for .300 Blackout subsonic loads. This caliber shines in suppressed applications where the shorter barrel doesn't sacrifice velocity the way it would with 5.56. The 1:8 twist rate stabilizes the heavier projectiles common to subsonic ammunition, ensuring consistent performance across the velocity spectrum.

Freefloat Keymod Ecosystem

The 12-inch freefloat Keymod handguard isolates the barrel from mounting pressure, improving accuracy potential. Keymod slots run the full length, giving you flexibility to attach lights, foregrips, and other accessories without rail clutter. The freefloat design also helps manage heat during extended shooting sessions.

Complete Upper Assembly Ready to Mount

This upper includes everything except the lower receiver. The USA-made bolt carrier group, charging handle, forward assist, and ejection port door come assembled. The 5/8x24 muzzle device threads directly onto the barrel with the included crush washer. Simply attach to your lower receiver and you're ready to run.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. BCG and charging handle are not included with upper build kits.