Davidson Defense Warden Duty 10.5-inch Pistol-Gas 1:8 .338 ARC AR-15 Freefloat Keymod Handguard Pistol Upper Build Kit

Warden Duty 10.5-Inch .338 ARC AR-15 Pistol Upper Build Kit

This upper build kit combines a 10.5-inch 4150 CrMoV barrel with a freefloat Keymod handguard, chambered in .338 ARC. The kit includes an anodized 7075-T6 aluminum upper receiver with M4 feed ramps, micro low-profile gas block, pistol-length gas tube, GI birdcage flash hider, and forward assist assembly. BCG and charging handle are not included.

Key Features

• 10.5-inch HBAR barrel, 4150 CrMoV steel with phosphate finish, 1:8 twist rate
• Freefloat Keymod handguard, aluminum construction, slim profile, black
• Anodized AR-15 upper receiver with M4 feed ramps, 7075-T6 aluminum
• Pistol-length gas system with stainless gas tube and .750 micro low-profile gas block
• 5/8x24 threaded barrel with GI birdcage flash hider
• Forward assist assembly included

Perfect For

• Compact .338 ARC builds requiring pistol-length gas systems
• Shooters prioritizing accessory compatibility through Keymod attachment points
• Builders seeking HBAR profile barrels for enhanced rigidity
• Configurations demanding lightweight freefloat handguards

.338 ARC Chambering

.338 ARC delivers substantial energy transfer and extended effective range in a compact platform. The caliber provides stopping power suitable for medium game applications while maintaining compatibility with AR-15 platform dimensions.

Freefloat Keymod Handguard

The freefloat Keymod handguard provides a slim aluminum profile with modular Keymod slots for direct accessory mounting. The freefloat design isolates the barrel from external pressure, supporting accuracy in compact upper configurations.

Pistol-Length Gas System

This kit uses a pistol-length gas system with a stainless gas tube and .750 micro low-profile gas block positioned beneath the handguard. The pistol-length configuration is optimized for the 10.5-inch barrel length.

Compatibility and Assembly

This upper build kit is compatible with standard AR-15 lower receivers. All components use mil-spec dimensions and threading, including the 5/8x24 TPI muzzle threads matching the included GI birdcage flash hider.

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