Spike's Tactical Crusader AR-15 Rifle Lower Build Kit, FDE M4-Style Adjustable Stock

Spike's Tactical Crusader AR-15 Rifle Lower Build Kit, FDE M4-Style Adjustable Carbine Stock

This is a complete lower build kit designed for AR-15 builders who want a quality foundation with distinctive styling. It combines. Spike's Tactical. Crusader lower receiver with a Davidson. Defense mil-spec lower parts kit, heavy-duty buffer tube, standard carbine buffer and spring, and an FDE M4-style adjustable stock. The lower receiver is stripped and ready for assembly. The lower receiver is not included in this kit—you'll need to source that separately. Lower receiver not included.

Key Features

• Spike's Tactical Crusader STLS022 lower receiver with hard coat anodized black finish
• Davidson Defense 31-piece mil-spec lower parts kit with complete fire control group
• Mil-spec curved trigger, hammer, disconnector, and safety selector
• Davidson Defense heavy-duty 6-position carbine receiver extension with Type II anodized finish
• Standard AR-15 carbine recoil buffer and spring
• FDE M4-style adjustable carbine stock with molded cheek rest and textured buttplate
• Mil-spec A2 pistol grip in black with grip hardware included
• US Tactical receiver end plate and Davidson Defense castle nut
• Integrated rear sling loop on stock for attachment options
• Multi-caliber lower receiver compatible with standard AR-15 pattern magazines and components

Perfect For

• Builders constructing a complete AR-15 rifle from stripped components
• Users who prefer distinctive receiver styling with Crusader branding and custom selector markings
• Shooters wanting a reliable mil-spec configuration without premium pricing
• Those building a carbine length platform with adjustable length of pull

Crusader Lower Receiver Design

The. Spike's Tactical. Crusader STLS022 lower features hard coat anodized aluminum construction in black with distinctive. Crusader shield and cross engraving. The selector markings include "PAX PACIS," "BELLUM," and "DEUS VULT" on one side, with "PEACE," "WAR," and "GOD WILLS IT" on the opposite side. This lower is multi-caliber marked and maintains full compatibility with standard AR-15 pattern magazines, fire control components, and buffer system parts. The receiver weighs 0.75 lb and is manufactured by. Spike's Tactical under part number STLS022.

Davidson Defense Lower Parts Kit and Buffer System

This kit includes a Davidson. Defense 31-piece mil-spec lower parts kit containing all internal components required for lower assembly: complete fire control group with curved mil-spec trigger and hammer, disconnector, safety selector, all required pins and detents, magazine catch assembly, bolt catch assembly, trigger guard, buffer retainer, and complete spring set. The buffer tube is a Davidson. Defense heavy-duty 6-position carbine receiver extension machined from 6061 aluminum with. Type II anodized black finish. The standard AR-15 carbine recoil buffer features a 6061 aluminum body with steel internal weights and polymer impact pad, paired with a USA-made carbine recoil spring. The US Tactical receiver end plate and. Davidson. Defense mil-spec castle nut complete the buffer system.

M4-Style Adjustable Stock and Grip Configuration

The FDE M4-style adjustable carbine stock provides 6 positions for length of pull adjustment via spring-loaded position lever. Constructed from lightweight reinforced polymer, it features a molded upper cheek-weld surface for consistent sight picture and a molded textured rear buttplate for secure shoulder contact. An integrated rear sling loop allows for sling attachment without additional hardware. The stock slides onto the mil-spec carbine buffer tube and is compatible with standard AR-15 platforms. The kit includes a mil-spec A2 pistol grip in black with grip screw and washer hardware.

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