Davidson Defense Bluegrass 16-inch .350 Legend AR-15 Upper Build – Straight-Wall Upper for Hunting Builds

Bluegrass 16-Inch .350 Legend AR-15 Full Build Kit, Straight-Wall Hunting Build

The Bluegrass Full Build Kit is built around a 16-inch .350 Legend barrel machined from 4150 chrome moly vanadium steel in a medium profile, with a carbine-length gas system, a 1:16 twist, and a Nitride finish. It pairs a 7075-T6 aluminum upper receiver with M4 feed ramps and a 15-inch M-LOK handguard, and it ships with a complete bolt carrier group, a mil-spec M4 charging handle, a complete lower parts kit, a full buffer system, and an Adaptive Tactical EX Performance adjustable stock. The .350 Legend is a straight-wall cartridge, which makes this build a fit for hunting in regions that restrict bottleneck rifle cartridges. Lower receiver is not included.

Key Features

• 16-inch medium profile barrel, 4150 CrMoV steel, Nitride finish, 1:16 twist, .350 Legend, 5/8x24 muzzle threads
• Carbine-length gas system with a stainless steel gas tube and a micro low-profile gas block sized for .750 inch
• 7075-T6 aluminum upper receiver with M4 feed ramps, anodized finish
• Forward assist assembly and .223/5.56 ejection port door, rod, and spring included
• 15-inch M-LOK handguard, 6061-T6 aluminum
• AR-15/AR-10 .308 GI birdcage flash hider on 5/8x24 threads with 5/8-inch black crush washer
• Complete AR-15 bolt carrier group (5.56/.223/.300/.350), 9310 alloy steel, Nitride finish
• Mil-spec quality AR-15 M4 charging handle
• Complete mil-spec AR-15 Lower Parts Kit
• Mil-spec heavy-duty six-position buffer tube, 3 oz. carbine buffer, USA-made carbine recoil spring, castle nut, and mil-spec receiver end plate
• Adaptive Tactical EX Performance adjustable stock, AT-02012-B
• Lower receiver is not included.

Barrel and Gas System

The 16-inch barrel is machined from 4150 chrome moly vanadium steel in a medium profile and finished in Nitride, a surface treatment that adds hardness and corrosion resistance with a clean, matte black look. It is chambered in .350 Legend with a 1:16 twist. The carbine-length gas system runs through a stainless steel gas tube and a micro low-profile gas block, and the 5/8x24 muzzle carries the included GI birdcage flash hider with a black crush washer.

Upper Receiver and Handguard

The upper is machined from 7075-T6 aluminum with M4 feed ramps and an anodized finish, and it includes the forward assist and ejection port door assembly. The 15-inch M-LOK handguard is machined from 6061-T6 aluminum and gives the builder room for lights, grips, and other accessories.

Bolt Carrier Group, Lower Parts, and Stock

The included bolt carrier group is rated for 5.56, .223, .300 Blackout, and .350 Legend and is paired with a mil-spec M4 charging handle. The kit adds a complete mil-spec lower parts kit, a heavy-duty six-position buffer tube with a 3-ounce buffer, recoil spring, castle nut, and end plate, and an Adaptive Tactical EX Performance adjustable stock built for the six-position tube.

Compatibility

This kit is built for AR-15 lower receivers chambered in .350 Legend. Handguard length attachment details, pistol grip, and magazine were not supplied with this listing and should be confirmed before purchase. A .350 Legend magazine suited to the lower must be sourced separately.

Follow all manufacturer instructions and safe handling practices.

Ensure compliance with all applicable federal, state, and local laws.