Davidson Defense Warden Duty 10.5-inch Pistol-Gas 1:8 6.5 Grendel AR-15 Freefloat Keymod Handguard Pistol Complete Upper Build

Warden Duty 10.5-Inch 6.5 Grendel AR-15 Pistol Complete Upper

This complete upper features a 10.5-inch 4150 CrMoV barrel with a freefloat Keymod handguard, chambered in 6.5 Grendel. The upper includes an anodized 7075-T6 aluminum receiver with M4 feed ramps, micro low-profile gas block, pistol-length gas system, GI birdcage flash hider, mil-spec charging handle, and 6.5 Grendel II QPQ nitride bolt carrier group with 9310 alloy steel construction.

Key Features

• 10.5-inch HBAR barrel, 4150 CrMoV steel with phosphate finish, 1:8 twist rate
• Freefloat Keymod handguard, aluminum construction, slim profile
• 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
• AR-15 6.5 Grendel II QPQ nitride bolt carrier group, 9310 alloy steel
• Mil-spec AR-15 M4 charging handle

Perfect For

• Compact 6.5 Grendel builds requiring complete upper assemblies
• Shooters prioritizing accessory compatibility through Keymod attachment points
• Builders seeking HBAR profile barrels with complete bolt carrier groups
• Configurations demanding lightweight freefloat handguards with included internals

6.5 Grendel Chambering

6.5 Grendel offers extended effective range and superior ballistic performance compared to standard 5.56 NATO, making it well suited for precision applications where barrel length constraints apply.

QPQ Nitride Bolt Carrier Group

The 6.5 Grendel II bolt carrier group features QPQ nitride finish over 9310 alloy steel. The nitride treatment provides corrosion resistance and surface hardness while reducing friction. This BCG is designed specifically for 6.5 Grendel chambering.

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.

Compatibility and Assembly

This complete upper 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.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.