Davidson Defense Aegis w/ DTT Plan B Radial Brake w/SBA5 Brace 8.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat Keymod Handguard Pistol Full Build Kit

Davidson Defense Aegis AR-15 Pistol Full Build Kit - 8.5-inch, .300 Blackout, Pistol Gas, Freefloat Keymod Handguard, DTT Plan B Radial Brake, SB Tactical SBA5 Brace

The Davidson Defense Aegis is a .300 Blackout AR-15 pistol full build kit built around a 7075-T6 aluminum upper receiver with an anodized finish. The kit includes an 8.5-inch heavy profile barrel in 4150 chrome moly vanadium steel with a parkerized finish, a 1:8 twist rate, and a 5/8x24 thread pitch, a freefloat Keymod handguard in black aircraft-grade aluminum, a micro low-profile 0.75 pistol gas block, a Plan B Radial Hole Brake in 17-4 stainless steel with a black nitride finish at 5/8x24, a nitride-finished bolt carrier group with a 9310 alloy steel bolt and 8620 alloy steel body, an anodized aluminum Mil-Spec charging handle, an SB Tactical SBA5 black nylon reinforced polymer pistol stabilizing brace, a Mil-Spec heavy-duty 6-position buffer tube, a 3 oz aluminum buffer with internal steel weights, a spring steel recoil spring, an end plate, and a castle nut. Lower receiver not included.

Key Features

• 7075-T6 aluminum upper receiver, anodized finish
• 8.5-inch heavy profile barrel, 4150 chrome moly vanadium, parkerized finish
• .300 Blackout
• 1:8 twist rate
• 5/8x24 thread pitch
• Pistol gas system
• Micro low-profile 0.75 gas block
• Freefloat Keymod handguard, aircraft-grade aluminum, black
• Plan B Radial Hole Brake, 17-4 stainless steel, black nitride finish, 5/8x24
• Bolt carrier group, 9310 alloy steel bolt, 8620 alloy steel body, nitride finish
• Mil-Spec charging handle, anodized aluminum
• SB Tactical SBA5 black nylon reinforced polymer pistol stabilizing brace
• Mil-Spec heavy-duty 6-position buffer tube
• 3 oz aluminum buffer with internal steel weights
• Spring steel recoil spring
• End plate
• Castle nut
• Lower receiver not included

Perfect For

• AR-15 pistol builders sourcing a complete .300 Blackout full build kit with the DTT Plan B muzzle device and SBA5 brace
• Shooters pairing this kit with an existing AR-15 lower receiver
• Builders looking for a compact .300 Blackout pistol build kit with a Plan B compatible muzzle device

Barrel and Gas System

The barrel is an 8.5-inch heavy profile unit in 4150 chrome moly vanadium steel with a parkerized finish, chambered in .300 Blackout with a 1:8 twist rate and a 5/8x24 thread pitch. The pistol-length gas system pairs with a micro low-profile 0.75 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, threaded at 5/8x24. 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, forming the structural core of the upper assembly. The freefloat Keymod handguard is aircraft-grade aluminum in black, surrounding the barrel without contact and providing Keymod mounting positions for compatible accessories.

Bolt Carrier Group and Charging Handle

The included bolt carrier group features a 9310 alloy steel bolt and an 8620 alloy steel body, both with a nitride finish. The BCG and Mil-Spec anodized aluminum charging handle work together to cycle the action and complete the upper side component set.

Brace and Buffer System

The SB Tactical SBA5 black nylon reinforced polymer pistol stabilizing brace is included with a Mil-Spec heavy-duty 6-position buffer tube. The buffer system consists of a 3 oz aluminum buffer with internal steel weights and a spring steel recoil spring. An end plate and castle nut complete the rear hardware included with this full build kit.

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