Davidson Defense Atriox 10.5-inch Pistol-Gas 1:8 6.5 Grendel AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit, SBR Ready

Atriox 10.5-Inch 6.5 Grendel AR-15 Pistol Full Build Kit, SBR Ready

This SBR Ready full build kit combines a 10.5-inch Bear Creek 4150 CrMoV barrel with a 10-inch M-Lok freefloat handguard, chambered in 6.5 Grendel. The kit includes an anodized 7075-T6 aluminum upper receiver with M4 feed ramps, micro low-profile gas block, pistol-length gas system, GI birdcage flash hider, mil-spec charging handle, 6.5 Grendel II QPQ nitride bolt carrier group, mil-spec heavy-duty 6-position buffer tube, 3 oz carbine buffer, spring steel carbine recoil spring, castle nut, end plate, and complete mil-spec lower parts kit. Ships without a brace. Lower receiver not included.

Key Features

• SBR Ready configuration, ships without a brace
• 10.5-inch Bear Creek HBAR barrel, parkerized 4150 CrMoV steel, 1:8 twist rate
• 10-inch M-Lok freefloat handguard with quad rail section, 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
• AR-15 6.5 Grendel II QPQ nitride bolt carrier group, 9310 alloy steel bolt head, 8620 alloy steel body
• Mil-spec heavy-duty 6-position buffer tube with 3 oz carbine buffer, spring steel carbine recoil spring, castle nut, and end plate
• 5/8x24 threaded barrel with GI birdcage flash hider
• Complete mil-spec AR-15 lower parts kit with fire control group

Perfect For

• SBR builds requiring complete component sets without a brace
• Shooters selecting their own brace or stock configuration
• Builders seeking Bear Creek HBAR profile barrels with 6.5 Grendel chambering
• Configurations demanding M-Lok freefloat handguards with complete lower parts

SBR Ready Configuration

This kit ships without a brace, intended for customers selecting their own final setup. The included mil-spec heavy-duty 6-position buffer tube, 3 oz carbine buffer, spring steel carbine recoil spring, castle nut, and end plate accommodate brace or stock attachment based on your chosen configuration.

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.

Compatibility and Assembly

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

Ships without a brace. Do not install a stock unless compliant with applicable laws. Lower receiver not included. Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.