Davidson Defense Atriox 10.5-inch Pistol-Gas 1:8 6.5 Grendel AR-15 Freefloat M-Lok Handguard Pistol Complete Upper Build

Atriox 10.5-Inch 6.5 Grendel AR-15 Pistol Complete Upper

This complete upper features a 10.5-inch Bear Creek 4150 CrMoV barrel with a 10-inch M-Lok freefloat 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 bolt head and 8620 alloy steel body.

Key Features

• 10.5-inch Bear Creek HBAR barrel, 4150 CrMoV steel with phosphate finish, 1:8 twist rate
• 10-inch M-Lok freefloat handguard, 6061-T6 aluminum with Cerakote finish, black
• Anodized AR-15 upper receiver with M4 feed ramps, 7075-T6 aluminum
• Pistol-length gas system with stainless steel 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 bolt head, 8620 alloy steel body
• Mil-spec AR-15 M4 charging handle

Perfect For

• Compact 6.5 Grendel builds requiring complete upper assemblies
• Shooters prioritizing M-Lok accessory compatibility with Cerakote finish
• Builders seeking Bear Creek HBAR profile barrels with complete bolt carrier groups
• Configurations demanding 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 bolt head and 8620 alloy steel body. The nitride treatment provides corrosion resistance and surface hardness while reducing friction. This BCG is designed specifically for 6.5 Grendel chambering.

M-Lok Freefloat Handguard

The 10-inch M-Lok freefloat handguard features 6061-T6 aluminum construction with Cerakote finish and M-Lok slots for modular accessory attachment. 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.