Davidson Defense Spectre 8.5" 5.56 NATO AR-15 Pistol Build Kit, 7" Quad-Rail, w/ SB Tactical SBA3 Brace

Spectre 8.5" 5.56 NATO AR-15 Pistol Build Kit, 7" Quad-Rail, w/ SB Tactical SBA3 Brace

This is a complete AR-15 pistol build kit designed for shooters who want a compact, maneuverable platform without sacrificing reliability. The 8.5-inch nitride barrel paired with a free-float quad-rail handguard delivers excellent accuracy for a short-barreled configuration. The kit includes everything except the lower receiver: upper assembly, bolt carrier group, charging handle, buffer tube system, and SB Tactical SBA3 stabilizing brace.

Key Features

• 8.5-inch 4150 CrMoV nitride barrel with 1:7 twist rate for 5.56 NATO
• Free-float 7-inch quad-rail handguard for reduced barrel harmonics
• Micro low-profile gas block with pistol length gas tube
• Complete bolt carrier group with 9310 alloy steel carrier and nitride finish
• SB Tactical SBA3 adjustable stabilizing brace included
• Mil-spec heavy-duty 6-position buffer tube
• A2 birdcage flash hider with crush washer
• Upper receiver machined from 7075-T6 aluminum with M4 feed ramps

Perfect For

• Shooters building a compact, maneuverable AR-15 pistol platform
• Home defense and close-quarters configurations
• Shooters who want a shorter overall length without sacrificing ballistics
• Builders looking for a complete upper and lower parts assembly

Compact Pistol Configuration

This kit delivers the balance of maneuverability and performance that defines modern AR-15 pistol builds. The 8.5-inch barrel maintains effective velocity for 5.56 NATO rounds while keeping the overall footprint significantly smaller than rifle-length configurations. The free-float quad-rail design isolates the barrel from handguard contact, improving consistency shot to shot. The micro low-profile gas block and pistol length gas tube are sized specifically for short-barrel cycling reliability.

SB Tactical SBA3 Stabilizing Brace

The included SB Tactical SBA3 brace is one of the most popular pistol braces on the market. It adjusts to fit various grip preferences and provides a stable shooting platform. The brace is legal for use on AR-15 pistols under current federal law. The design allows for wrist strap adjustment and multiple position settings to accommodate different shooting styles and hand sizes.

Upper Assembly and Bolt Carrier Group

The upper assembly is built on a 7075-T6 aluminum receiver with proper M4 feed ramps for reliable feeding. The bolt carrier group uses 9310 alloy steel with nitride finish, providing durability and corrosion resistance. The charging handle is mil-spec quality and compatible with standard AR-15 uppers. The complete bolt carrier group is ready to function immediately upon assembly.

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