PSA AR-15 SBA4 Classic Pistol Lower Build Kit

The PSA SBA4 Classic Pistol Lower Build Kit – Black or FDE is a premium, all-in-one solution for builders looking to create a reliable AR-15 pistol. This high-quality kit from Palmetto State Armory delivers everything needed (minus the stripped lower receiver and upper) to assemble a smooth-functioning pistol lower, featuring the popular SB Tactical SBA4 Adjustable Pistol Brace for enhanced stability and comfort.

Key highlights include a Mil-Spec fire control group for consistent, dependable performance, a classic A2-style grip, USGI trigger guard, and durable black oxide-coated hammer and trigger springs. The kit pairs these with a 5-position mil-spec carbine buffer tube, standard carbine buffer and spring, castle nut, and latch plate—ensuring compatibility with most AR-15 pistol builds.

The centerpiece is the SB Tactical SBA4 brace, a 5-position adjustable design (lengths from 7.5″ to 10.25″) with an integral ambidextrous QD sling socket and adjustable nylon strap. Weighing just 10 oz with a 6.75″ cavity depth, it offers superior stability, improved accuracy, and quick deployment—ideal for range use, home defense, or tactical setups.

Built on the trusted PA-15 platform, this Black or FDE  finished kit supports multi-caliber AR-15 pistol configurations (ensure compliance with all laws when selecting uppers and barrels). Backed by PSA’s Full Lifetime Warranty (transferable, covers defects in materials and workmanship), it’s American-made quality at an unbeatable value.Whether you’re a first-time builder or experienced enthusiast, this kit provides mil-spec reliability, easy assembly, and the SBA4’s enhanced ergonomics—helping you complete a custom AR pistol that’s ready for action.

What’s Included:

• SB Tactical SBA4 Adjustable Pistol Brace (Black)
• Mil-Spec Fire Control Group (Hammer, Trigger, Disconnector, Pins, Springs – black oxide coated hammer/trigger springs)
• Classic A2 Pistol Grip
• USGI Trigger Guard
• 5-Position Mil-Spec Carbine Buffer Tube
• Standard Carbine Buffer & Carbine Buffer Spring
• Castle Nut & Latch Plate
• Complete Lower Parts Kit (Takedown/Pivot Pins, Bolt Catch, Mag Catch, Safety Selector, Detents, Springs)

Specifications:

• Platform: AR-15
• Caliber: Multi (depends on upper)
• Brace: SB Tactical SBA4 (5-position adjustable, QD sling socket, 10 oz weight)
• Buffer Tube: Mil-Spec carbine, 5-position
• Grip: Classic
• Trigger Guard: USGI
• Fire Control: Mil-Spec

Important: Always follow federal, state, and local laws regarding firearm assembly, braces, and pistol configurations. Not for use in SBR builds without proper NFA compliance.

By purchasing PSA AR-15 SBA4 Classic Pistol Lower Build Kit from our online store, you are guaranteed to receive a high-quality item. We work with trusted brands to offer shooting and hunting enthusiasts, both amateur and professional, quality products at a reasonable price. Choosing to buy from us means opting for quality and practicality

The actual appearance of the product may differ from the image on the website. For additional information about payment, delivery, and product specifications, please contact us by phone or email.