SB Tactical SBA6 5-Position Adjustable Pistol Stabilizing Brace Kit with Mil-Spec 6-Position Buffer Tube, 3 oz. Buffer, Carbine Spring, End Plate, Castle Nut & Davidson Defense Match Grade Gen 2 31-Piece LPK with 3.5 lb Skeletonized Straight Trigger

SB Tactical SBA6 5-Position Adjustable Pistol Stabilizing Brace Kit with Mil-Spec 6-Position Buffer Tube, 3 oz. Buffer, Carbine Spring, End Plate, Castle Nut & Davidson Defense Match Grade Gen 2 31-Piece LPK with 3.5 lb Skeletonized Straight Trigger

This kit pairs an SB Tactical SBA6 pistol stabilizing brace with a complete Mil-Spec heavy-duty six-position carbine buffer tube system and a Davidson Defense Match Grade Gen 2 31-piece Lower Parts Kit, covering nearly everything needed to complete an AR-15 pistol build's lower short of the receiver itself.

Key Features

• SB Tactical SBA6 pistol stabilizing brace, 5-position adjustable
• Slim, lightweight, snag-resistant carbine-style profile
• Adjustable nylon stabilizing strap included
• Mil-Spec heavy-duty 6-position carbine buffer tube
• 3 oz. standard carbine buffer and USA-made recoil spring
• Davidson Defense Match Grade Gen 2 31-piece Lower Parts Kit with 3.5-lb skeletonized straight trigger
• US Tactical Mil-Spec receiver end plate and carbine castle nut included

Stabilizing Brace

The SBA6 is molded from high-strength, impact-resistant polymer in a streamlined, carbine-style profile and finished in matte black. It adjusts across 5 positions, running from approximately 6.2 to 10.25 inches in length depending on the position selected, with a height of roughly 4.5 to 5.0 inches and a width of up to 2.1 inches at its widest point. The rear surface carries a slim, non-slip rubberized texture, and an adjustable nylon stabilizing strap is included for securing the brace to the forearm.

Lower Parts Kit and Trigger

At the heart of this kit is a Davidson Defense 31-piece Match Grade Gen 2 Lower Parts Kit, built for standard Mil-Spec AR-15 lower receivers and made from a mix of steel, aluminum, and polymer. The centerpiece is a single-stage trigger with a straight, skeletonized shoe, machined from steel and finished in black oxide, breaking at a light 3.5-pound pull weight suited to precision shooting and competition-oriented builds. The complete fire control group is included alongside the trigger, and a Mil-Spec A2 grip finished in black polymer rounds out the kit's ergonomics.

Buffer Tube and Buffer System

Behind the brace 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. A US Tactical AR-15/M16 Mil-Spec receiver end plate and AR-15 carbine castle nut secure the entire buffer tube assembly to the lower receiver.

Follow all manufacturer instructions and safe handling practices.

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