Davidson Defense Midnight Marshall 7.5" 5.56 NATO AR-15 Pistol Build Kit, M-Lok, 1:7, w/ SBA3 Brace

Midnight Marshall 7.5" 5.56 NATO AR-15 Pistol Build Kit, M-Lok, 1:7, w/ SBA3 Brace

The Midnight Marshall is a complete AR-15 pistol build kit built around a 7.5-inch barrel with a 1:7 twist rate and pistol-length gas system. It includes everything except the lower receiver: upper assembly, bolt carrier group, charging handle, buffer tube, buffer, recoil spring, end plate, castle nut, lower parts kit, and SBA3 brace. This is a compact, maneuverable platform designed for shooters who want a short-range, high-velocity 5.56 NATO setup in a pistol format.

Key Features

• 7.5-inch 4150 chrome moly barrel with 1:7 twist and pistol gas system
• SB Tactical SBA3 adjustable stabilizing brace for control and support
• 7-inch M-Lok handguard with partial top Picatinny rail for mounting flexibility
• Micro low-profile gas block for compact profile and reliability
• Complete bolt carrier group in nitride finish with 8620 alloy steel body
• Mil-spec charging handle and 6-position buffer tube for standard controls

Perfect For

• Shooters building a compact, close-quarters AR-15 pistol
• Builders looking for a complete kit minus the serialized lower receiver
• Users prioritizing maneuverability in confined spaces
• 5.56 NATO enthusiasts wanting a short-barrel platform

Compact Pistol Platform

The 7.5-inch barrel delivers velocity suitable for 5.56 NATO while keeping overall length minimal. The 1:7 twist stabilizes a wide range of bullet weights, from 55-grain to heavier rounds. Pistol-length gas systems cycle faster on short barrels, and this setup uses a micro low-profile gas block to keep the upper lean and unobstructed. The result is a platform that's quick to handle and easy to maneuver in tight environments.

SBA3 Brace and Control

The SB Tactical SBA3 provides a stable, adjustable mounting point for your support arm. The brace is fully adjustable across multiple positions, allowing you to dial in comfort and control. It's constructed from durable polymer and designed for shooters who want repeatable support without traditional stock configurations. The 6-position buffer tube allows further customization of length of pull to match your setup.

Freefloat M-Lok Handguard

The 7-inch M-Lok handguard floats free from the barrel, eliminating contact that can affect accuracy. The partial Picatinny top rail section gives you mounting real estate for optics, lights, or other accessories without forcing full-length rail coverage. M-Lok slots along the sides and bottom accept a wide range of tactical attachments and allow for cable management and customization.

Complete Build Kit Components

This kit includes the bolt carrier group, charging handle, lower parts kit, buffer tube, buffer, recoil spring, end plate, and castle nut. All you need to add is a serialized lower receiver to complete the firearm. The bolt carrier group uses 8620 alloy steel for the body and 9310 alloy steel for the bolt head, finished in nitride for corrosion resistance and longevity.

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