Spike’s Tactical Crusader AR-15 Lower Kit with SBA6 Adjustable Stabilizing Brace

Spike's Tactical Crusader AR-15 Pistol Lower Build Kit with SBA6 Adjustable Stabilizing Brace

This is a complete AR-15 pistol lower build kit that gives you everything needed to finish a stripped lower receiver except the serialized receiver itself. You get the Spike's Tactical Crusader lower receiver, a full 31-piece Davidson Defense mil-spec lower parts kit, a heavy-duty buffer tube assembly, and the SB Tactical SBA6 adjustable stabilizing brace. The lower receiver is multi-caliber marked aluminum with hard coat anodized black finish and features the iconic Crusader shield engraving plus bilingual selector markings. This kit is designed for shooters building AR-15 pistol configurations with standard mil-spec compatibility across all components.

Key Features

• Spike's Tactical Crusader STLS022 lower receiver with hard coat anodized finish and Crusader shield engraving
• SB Tactical SBA6 5-position adjustable stabilizing brace with slim profile and rubberized surface
• Davidson Defense 31-piece mil-spec lower parts kit with complete fire control group
• Davidson Defense heavy-duty 6-position carbine receiver extension in anodized aluminum
• Standard AR-15 carbine buffer and recoil spring included
• Mil-spec A2 pistol grip with hardware
• US Tactical mil-spec receiver end plate and Davidson Defense castle nut
• Multi-caliber receiver marking with standard AR-15 pattern magazine compatibility

Perfect For

• Shooters building custom AR-15 pistol configurations
• Builders wanting a complete lower assembly without the upper receiver
• Those seeking quality mil-spec components with name-brand reliability
• AR-15 enthusiasts who prefer Spike's Tactical receiver quality and aesthetics
• Pistol platform builds using standard AR-15 upper assemblies

Crusader Lower Receiver Design

The Spike's Tactical Crusader lower receiver uses 6061 aluminum with hard coat anodized black finish, providing durability and corrosion resistance. The receiver features the Crusader shield logo engraving on the left side and includes bilingual selector markings: "PAX PACIS," "BELLUM," and "DEUS VULT" on one side with "PEACE," "WAR," and "GOD WILLS IT" on the opposite side. The multi-caliber marking supports standard AR-15 pattern magazines and mil-spec fire control components, making this receiver compatible with most AR-15 upper assemblies and configurations.

SBA6 Adjustable Stabilizing Brace

The SB Tactical SBA6 is a 5-position adjustable stabilizing brace designed for mil-spec carbine receiver extensions. The brace features a slim, lightweight profile with a non-slip rubberized rear surface and an adjustable nylon stabilizing strap. Length adjusts from approximately 6.2 inches to 10.25 inches depending on position, and the overall height ranges from 4.5 to 5.0 inches. The high-strength impact-resistant polymer construction keeps weight at 9 ounces, and the streamlined design resists snagging. The brace mounts directly to the included Davidson Defense heavy-duty buffer tube via the standard mil-spec carbine interface.

Complete Lower Parts Kit Assembly

This kit includes a Davidson Defense 31-piece mil-spec lower parts kit with all components needed to complete the lower receiver assembly. The fire control group includes a standard curved mil-spec trigger, mil-spec hammer, disconnector, and mil-spec safety selector with complete detent springs and pins. Magazine catch assembly, bolt catch assembly, pivot pin, takedown pin, and trigger guard are all included. The kit uses steel, aluminum, and polymer materials with phosphate and anodized finishes for durability and corrosion resistance. A mil-spec A2 pistol grip in black with mounting hardware is included.

Buffer System Components

The buffer assembly includes a Davidson Defense heavy-duty 6-position carbine receiver extension machined from 6061 aluminum with type II anodized black finish. The buffer tube measures 1.145 inches outer diameter with 1-inch inner diameter and weighs 3.8 ounces. A standard AR-15 carbine recoil buffer with 3-ounce aluminum body and steel internal weights is included, along with a polymer impact pad tip. The carbine recoil spring is made in the USA and provides standard AR-15 cycling performance. A US Tactical mil-spec receiver end plate and Davidson Defense mil-spec carbine castle nut complete the rear assembly.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. This is a lower build kit only and requires a serialized lower receiver to be functional.