Davidson Defense Silent Commando w/SBA5 Brace 10.5-inch 5.56 NATO AR-15 Drop-In Quad-Rail Pistol Full Build Kit, Plan B Trident Flash Hider

Silent Commando w/SBA5 Brace 10.5-inch 5.56 NATO AR-15 Full Build Kit w/Plan B Trident Flash Hider

The Silent Commando is a Full Build Kit built around a 10.5-inch 5.56 NATO front-sight-base barrel, paired with an A2 fixed carry-handle upper receiver finished in black anodizing. It pairs a 7-inch M4 carbine-length drop-in quad-rail handguard with a Delta Team Tactical Plan B Trident flash hider at the muzzle, running on a carbine-length gas system. A complete bolt carrier group, Mil-Spec charging handle, complete Lower Parts Kit, carbine buffer-system components, and an SB Tactical SBA5 pistol stabilizing brace round out the rest of the build. The lower receiver is not included, leaving the buyer to select and supply that component separately.

Key Features

• 10.5-inch 5.56 NATO barrel, front sight base configuration
• Carbine-length gas system
• A2 fixed carry-handle upper receiver, black anodized finish
• LUTH-AR A2 rear sight assembly
• USA-made steel A2 front sight kit with sight post, plunger, and spring
• COLT AR-15 delta ring assembly
• 7-inch M4 carbine-length drop-in quad-rail handguard
• Delta Team Tactical Plan B Trident flash hider, 17-4 H1150 stainless steel, nitride finish, Plan B suppressor mount interface
• Complete bolt carrier group and Mil-Spec charging handle included
• SB Tactical SBA5 adjustable pistol stabilizing brace included
• Complete Mil-Spec Lower Parts Kit and carbine buffer-system components included
• Lower receiver is not included.

Barrel and Gas System

The barrel runs 10.5 inches long, chambered in 5.56 NATO and configured as a front sight base barrel. Gas cycles back to the action through a carbine-length system, running a carbine-length stainless steel gas tube.

Upper Receiver, Sights, and Handguard

The upper receiver is a fixed carry-handle A2 unit finished in black anodizing, fitted with an AR-15 forward assist assembly. The ejection port carries a standard .223/5.56 door with its rod and spring installed. The carry handle houses a LUTH-AR A2 rear sight assembly, paired at the front with a USA-made steel A2 front sight kit built from a sight post, plunger, and spring. A COLT AR-15 delta ring assembly secures the 7-inch M4 carbine-length drop-in quad-rail handguard over the barrel, finished in black.

Muzzle Device

Capping the muzzle is a Delta Team Tactical Plan B Trident flash hider, machined from 17-4 H1150 stainless steel and finished in nitride, built in a three-prong design with a Plan B-style suppressor mounting interface. It threads onto the barrel's 1/2x28 pattern.

Bolt Carrier Group and Charging Handle

A complete AR-15 bolt carrier group is included, made in the USA and listed for use across 5.56 NATO, .223 Remington, .300 Blackout, and .350 Legend. That broader listing describes the BCG itself; the barrel and chambering on this build remain 5.56 NATO. A Mil-Spec AR-15 M4 charging handle rounds out the upper's operating components.

Lower Parts Kit and Buffer System

A complete Mil-Spec AR-15 Lower Parts Kit covers the fire-control and lower-control internals needed once a lower receiver is on hand. Behind it sits a Mil-Spec heavy-duty six-position carbine buffer tube, holding a standard AR-15 carbine buffer weighing 3 ounces and a standard USA-made recoil spring. An AR-15 carbine castle nut and Mil-Spec AR-15/M16 receiver end plate secure the buffer tube assembly to the lower.

Stabilizing Brace

Capping off the build is an SB Tactical SBA5 pistol stabilizing brace, finished in black, built for a Mil-Spec carbine buffer tube and matching the buffer tube included with this kit.

Follow all manufacturer instructions and safe handling practices.

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

Lower receiver is not included.