Sharps Bros Ambi AR-15 Pistol Lower Build Kit with SBA3 Adjustable Brace

Sharps Bros Ambidextrous Bolt Release AR-15 Pistol Lower Build Kit, SBA3 Adjustable Stabilizing Brace

This is a complete lower build kit designed for AR-15 pistol configurations. It includes everything needed to complete a stripped lower receiver except the serialized receiver itself. The kit features a Sharps Bros Gen 2 Livewire receiver in 7075-T6 forged aluminum, paired with a mil-spec buffer system, complete lower parts kit, and an SB Tactical SBA3 adjustable stabilizing brace.

Key Features

• Sharps Bros Gen 2 Livewire receiver in 7075-T6 forged aluminum, CNC machined from custom forging
• Ambidextrous bolt release for left and right-handed operation
• SB Tactical SBA3 adjustable stabilizing brace with integrated QD sling socket
• Complete mil-spec lower parts kit with fire control group and pistol grip included
• Mil-spec heavy-duty 6-position carbine buffer tube with standard carbine buffer and recoil spring
• US Tactical mil-spec receiver end plate and AR-15 carbine castle nut included
• Made in the USA recoil spring

Perfect For

• Shooters building a reliable AR-15 pistol configuration
• Left and right-handed operators needing ambidextrous controls
• Builders wanting a quality forged receiver with proven durability
• Pistol builds requiring adjustable brace support and comfort

Sharps Bros Gen 2 Livewire Receiver Design

The Gen 2 Livewire receiver is machined from a custom 7075-T6 aluminum forging, delivering strength and precision in a compact package. The receiver weighs just 8.70 ounces and measures 2.30 by 4.35 by 8.75 inches. The ambidextrous bolt catch design allows both left and right-handed shooters to operate the rifle without switching hands or reaching across the platform. The threaded bolt catch pin adds durability and prevents accidental release.

SBA3 Stabilizing Brace System

The SB Tactical SBA3 is an adjustable minimalist design that works with the included mil-spec carbine buffer tube. The brace features an integrated stabilizing strap and a QD sling socket for easy attachment of sling systems. The adjustable design allows you to customize fit and comfort for your shooting style. The black finish matches the receiver and integrates seamlessly into the build.

Complete Mil-Spec Buffer System

This kit includes a mil-spec heavy-duty carbine buffer tube with six adjustment positions, a standard 3-ounce carbine buffer, and a made-in-the-USA carbine recoil spring. The buffer system works with the SBA3 brace to manage recoil and cycling. The US Tactical receiver end plate and AR-15 carbine castle nut secure the system and complete the assembly.

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