Davidson Defense Aegis w/ DTT Plan B Radial Brake 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit, SBR Ready

Davidson Defense Aegis AR-15 Full Build Kit - 14.5-inch, 5.56 NATO, Carbine Gas, M-Lok Freefloat Handguard, DTT Plan B Radial Brake, SBR Ready

The Davidson Defense Aegis is a 5.56 NATO AR-15 full build kit built around a 7075-T6 aluminum upper receiver with an anodized finish and M4 feed ramps. The kit includes a 14.5-inch government profile barrel in 4150 chrome moly vanadium steel with a phosphate finish, a 1:7 twist rate, and a 1/2x28 thread pitch, a freefloat M-Lok handguard in black aircraft-grade aluminum, a micro low-profile 0.750 steel carbine gas block, a Plan B Radial Hole Brake in 17-4 stainless steel with a black nitride finish and 18-hole radial ported pattern at 1/2x28, a nitride-finished 9310 alloy steel bolt carrier group compatible with 5.56 and .223 and .300 and .350, a Mil-Spec M4 aluminum charging handle, a heavy-duty 6-position black buffer tube, a 3 oz buffer, a spring steel recoil spring, a metal receiver end plate, and a castle nut. This kit is SBR Ready and ships without a brace. Lower receiver not included.

Key Features

• 7075-T6 aluminum upper receiver, anodized finish, M4 feed ramps
• 14.5-inch government profile barrel, 4150 chrome moly vanadium, phosphate finish
• 5.56 NATO
• 1:7 twist rate
• 1/2x28 thread pitch
• Carbine gas system
• Micro low-profile 0.750 steel gas block
• Freefloat M-Lok handguard, aircraft-grade aluminum, black
• Plan B Radial Hole Brake, 17-4 stainless steel, black nitride finish, 18-hole radial ported pattern, 1/2x28
• 9310 alloy steel bolt carrier group, nitride finish, 5.56 and .223 and .300 and .350 compatible
• Mil-Spec M4 aluminum charging handle
• Heavy-duty 6-position black buffer tube
• 3 oz buffer
• Spring steel recoil spring
• Metal receiver end plate
• Castle nut
• SBR Ready configuration
• Ships without a brace
• Lower receiver not included

Perfect For

• AR-15 pistol builders sourcing a complete 5.56 NATO full build kit with the DTT Plan B muzzle device in an SBR Ready configuration
• Shooters pairing this kit with an existing AR-15 lower receiver
• Builders selecting their own brace or stock for the final rear end setup

Barrel and Gas System

The barrel is a 14.5-inch government profile unit in 4150 chrome moly vanadium steel with a phosphate finish, chambered in 5.56 NATO with a 1:7 twist rate and a 1/2x28 thread pitch. The carbine-length gas system pairs with a micro low-profile 0.750 steel gas block to cover the gas regulation side of the upper.

Plan B Muzzle Device

The Plan B Radial Hole Brake is 17-4 stainless steel with a black nitride finish and an 18-hole radial ported pattern, threaded at 1/2x28. It supports modular suppressor mounting ecosystems and serves as the attachment interface for Plan B compatible suppressor systems.

Upper Receiver and Handguard

The upper receiver is 7075-T6 aluminum with an anodized finish and M4 feed ramps, forming the structural core of the upper assembly. The freefloat M-Lok handguard is aircraft-grade aluminum in black, surrounding the barrel without contact and providing M-Lok mounting positions for compatible accessories.

Bolt Carrier Group and Charging Handle

The included bolt carrier group is 9310 alloy steel with a nitride finish, compatible with 5.56, .223, .300, and .350 platforms. The BCG and Mil-Spec M4 aluminum charging handle work together to cycle the action and complete the upper side component set.

SBR Ready Configuration

This kit ships without a brace and is intended for buyers selecting their own final rear end setup. The buffer tube, recoil spring, end plate, and castle nut are included, but no brace or stock is provided. The final rear end configuration is dependent on the buyer's selected components.

Buffer System and Rear Hardware

The buffer system consists of a heavy-duty 6-position black buffer tube, a 3 oz buffer, and a spring steel recoil spring. A metal receiver end plate and castle nut complete the rear hardware included with this full build kit.

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