Davidson Defense Davidson Defense Avalanche 16" AR-15 .350 Legend Rifle Build Kit, Phosphate Finish

Davidson Defense Avalanche in .350 16-Inch AR-15 .350 Legend Phosphate Rifle Full Build Kit

The Davidson Defense Avalanche in .350 is a complete AR-15 build kit chambered in .350 Legend, featuring a 16-inch 4150 CrMoV barrel with phosphate finish, free-float quad rail handguard, and mil-spec components throughout. This kit includes everything needed to complete a functional rifle except the lower receiver, making it ideal for builders who want a proven cartridge platform with quality components at an accessible price point.

Key Features

• 16-inch 4150 CrMoV barrel with phosphate finish and 1:16 twist rate for .350 Legend ammunition
• Free-float quad rail handguard reduces barrel harmonics and improves accuracy potential
• Carbine-length stainless steel gas tube with micro low-profile gas block for reliable cycling
• Complete mil-spec lower parts kit, buffer tube assembly, and standard carbine recoil buffer included
• 7075-T6 aluminum upper receiver with anodized finish and M4 feed ramps
• AR-15 5.56/.223/.300/.350 complete bolt carrier group in 9310 alloy steel with nitride finish
• Adjustable carbine stock and mil-spec charging handle for comfortable operation
• AR-15/AR-10 .308 5/8x24 TPI GI birdcage flash hider included

Perfect For

• Builders seeking a complete .350 Legend platform without sourcing individual components
• Shooters wanting a mid-range cartridge option for hunting and target shooting
• Those prioritizing barrel quality and free-float accuracy improvements
• Budget-conscious builders who value mil-spec reliability

.350 Legend Platform and Cartridge Design

The .350 Legend cartridge offers a practical balance between power and recoil in an AR-15 platform. This kit delivers a purpose-built configuration with components selected for .350 Legend performance, including the appropriately-twisted barrel and compatible bolt carrier group. The free-float quad rail eliminates contact between barrel and handguard, reducing harmonic vibration that can affect shot placement.

Barrel and Gas System Configuration

The 16-inch 4150 CrMoV barrel provides a reliable foundation with proven material durability. Phosphate finish offers corrosion resistance without added weight. The carbine-length gas tube paired with the micro low-profile gas block ensures proper cycling with .350 Legend ammunition while maintaining a clean sight line. The 1:16 twist rate stabilizes .350 Legend projectiles effectively across standard velocity and subsonic loads.

Complete Kit Component Inclusion

This full build kit includes the upper assembly, bolt carrier group, charging handle, lower parts kit, buffer tube assembly, standard carbine recoil buffer, recoil spring, castle nut, end plate, and adjustable carbine stock. The lower receiver is not included and must be sourced separately as a serialized component.

Mil-Spec Build Quality

All components meet mil-spec standards for compatibility and durability. The 7075-T6 aluminum upper receiver with anodized finish resists wear. The bolt carrier group uses 9310 alloy steel with nitride coating for extended service life. The complete mil-spec lower parts kit ensures reliable trigger and hammer function.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included.