SB Tactical SBA6 5-Position Adjustable Pistol Stabilizing Brace Kit with Mil-Spec 6-Position Buffer Tube, Davidson Defense 9mm Carbine Buffer, Carbine Spring, End Plate, Castle Nut & 31-Piece Mil-Spec Lower Parts Kit

SB Tactical SBA6 5-Position Adjustable Pistol Stabilizing Brace Kit with Mil-Spec 6-Position Buffer Tube, Davidson Defense 9mm Carbine Buffer, Carbine Spring, End Plate, Castle Nut & 31-Piece Mil-Spec Lower Parts Kit

This kit pairs an SB Tactical SBA6 pistol stabilizing brace with a complete Mil-Spec heavy-duty six-position carbine buffer tube system fitted with 9mm-specific buffer hardware and a 31-piece Mil-Spec Lower Parts Kit, covering nearly everything needed to complete an AR-9 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
• Davidson Defense AR-15 9mm carbine buffer and USA-made recoil spring
• 31-piece Mil-Spec Lower Parts Kit with complete fire control group and pistol grip
• 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

This 31-piece Mil-Spec Lower Parts Kit supplies the internals and controls needed to complete a stripped AR-15/AR-9 lower receiver, including a complete Mil-Spec fire control group with trigger, hammer, disconnector, and their associated springs and pins, along with the magazine catch assembly, bolt catch assembly, safety selector assembly, and trigger guard components. Pivot and takedown pins, detents, springs, buffer retainer components, and a standard AR-15 pistol grip are all included as well, along with the hardware needed for installation. The kit is built from a mix of steel, aluminum, and polymer components, finished across phosphate and anodized surfaces depending on the part.

Buffer Tube and Buffer System

Behind the brace sits a Mil-Spec heavy-duty six-position carbine buffer tube, holding a Davidson Defense AR-15 9mm carbine buffer built for 9mm AR-pattern applications 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.