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Spike’s Tactical Crusader AR-15 Pistol Lower Build Kit, KAK Blade Arm Stabilizer Brace

Part Number: S-PI-P-LR15-66185
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On sale $231.99 $174.99
Retail Price:$231.99
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Spike's Tactical Crusader AR-15 Pistol Lower Build Kit with KAK Blade Brace

This is a complete AR-15 pistol lower build kit featuring Spike's Tactical's Crusader receiver paired with a Davidson Defense mil-spec lower parts kit and KAK Industry Blade stabilizer brace. The kit includes everything needed to complete a stripped lower receiver except the serialized lower receiver itself, making it ready for upper assembly integration on an AR-15 pistol platform.

Key Features

  • Spike's Tactical Crusader STLS022 lower receiver with hard coat anodized aluminum construction
  • Davidson Defense 31-piece mil-spec lower parts kit with complete fire control group
  • KAK Industry Blade arm stabilizer brace with integrated sling attachment points
  • Standard AR-15 pattern magazine and component compatibility
  • Mil-spec trigger, hammer, disconnector, and safety selector
  • Aircraft-grade aluminum pistol receiver extension buffer tube
  • Standard carbine recoil buffer and spring included
  • Receiver end plate and castle nut for complete buffer system assembly

Perfect For

  • AR-15 pistol builders seeking mil-spec reliability with quality components
  • Shooters wanting a complete lower build solution without receiver serialization
  • Builders prioritizing Spike's Tactical receiver quality and design
  • Pistol platform configurations using standard AR-15 parts ecosystem

Crusader Receiver Design

Spike's Tactical's Crusader lower features distinctive engraving with the Crusader Shield and Cross logo. The selector markings display "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 various platform configurations while maintaining the mil-spec aluminum construction and hard coat anodized finish.

Complete Lower Parts Kit Integration

The Davidson Defense 31-piece lower parts kit provides all internal components required for lower receiver completion. The kit includes the fire control group with curved mil-spec trigger and hammer, disconnector, safety selector, magazine catch assembly, bolt catch assembly, pivot and takedown pins, trigger guard, buffer retainer, and all required detents and springs. The mil-spec A2 pistol grip with hardware is included, along with materials combining steel, aluminum, and polymer construction with phosphate and anodized finishes.

Buffer System and Brace Assembly

The Davidson Defense AR-15 pistol receiver extension buffer tube features precision-machined aircraft-grade aluminum with Type II anodized black finish. The tube measures 7.375 inches in length with 1.24-inch outer diameter and 1-inch inner diameter, weighing 4.5 ounces. The kit includes a standard carbine recoil buffer with 3-ounce weight and polymer impact pad, plus the made-in-USA carbine recoil spring. The US Tactical mil-spec receiver end plate and Davidson Defense mil-spec castle nut complete the buffer system assembly. The KAK Industry Blade brace features reinforced polymer construction with a compact vertical blade-style design, set-screw retention, and integrated top and angled sling attachment slots for versatile carry options.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. Verify compatibility with your intended upper assembly configuration before assembly.

Specifications

Platform: AR-15

Lower Receiver: Spike’s Tactical Crusader STLS022 Lower Receiver

Lower Receiver Model: Crusader STLS022

Lower Receiver Caliber Marking: Multi-Caliber

Lower Receiver Material: Aluminum

Lower Receiver Finish: Hard Coat Anodized

Lower Receiver Color: Black

Lower Receiver Magazine Compatibility: Standard AR-15 Pattern Magazines

Lower Receiver Fire Control Compatibility: Standard AR-15 Pattern Components

Lower Receiver Buffer System Compatibility: Standard AR-15 Receiver Extension Components

Lower Receiver Grip Compatibility: Standard AR-15 Pistol Grips

Lower Receiver Engraving: Crusader Shield / Cross Logo

Lower Receiver Selector Markings: “PAX PACIS,” “BELLUM,” and “DEUS VULT”

Opposite-Side Selector Markings: “PEACE,” “WAR,” and “GOD WILLS IT”

Lower Receiver Manufacturer: Spike’s Tactical

Manufacturer Part Number: STLS022

Lower Receiver UPC: 855319005075

Lower Receiver Weight: 0.75 lb

Lower Parts Kit: Davidson Defense Complete Mil-Spec AR-15 Lower Parts Kit

Lower Parts Kit Piece Count: 31 Pieces

Fire Control Group: Complete Mil-Spec Fire Control Group

Trigger: Standard Curved Mil-Spec Trigger

Hammer: Mil-Spec Hammer

Disconnector: Included

Safety Selector: Mil-Spec Safety Selector

Trigger & Hammer Pins: Included

Magazine Catch Assembly: Included

Magazine Release Button: Included

Bolt Catch Assembly: Included

Pivot Pin: Included

Takedown Pin: Included

Trigger Guard: Included

Buffer Retainer: Included

Detents: Safety Selector, Pivot Pin, and Takedown Pin Detents Included

Springs: Complete Lower Parts Kit Spring Set Included

Pistol Grip: Mil-Spec A2 Pistol Grip

Pistol Grip Color: Black

Grip Hardware: Grip Screw and Washer Included

Lower Parts Kit Material Composition: Steel, Aluminum, and Polymer

Lower Parts Kit Finishes: Phosphate and Anodized

Buffer Tube: Davidson Defense AR-15 Pistol Receiver Extension Buffer Tube

Buffer Tube Type: Pistol Receiver Extension

Buffer Tube Application: AR-15 Pistol Builds

Buffer Tube Material: Aircraft-Grade Aluminum

Buffer Tube Construction: Precision-Machined Aluminum

Buffer Tube Finish: Type II Anodized

Buffer Tube Color: Black

Buffer Tube Profile: Smooth Pistol Buffer Tube

Buffer Tube Outer Diameter: 1.24"

Buffer Tube Inner Diameter: 1"

Buffer Tube Length: 7.375"

Buffer Tube Weight: 4.5 oz.

Buffer Tube Buffer Compatibility: Standard Carbine and Pistol-Weight Buffers

Buffer: Standard AR-15 Carbine Recoil Buffer

Buffer Weight: 3 oz.

Buffer Body Material: 6061 Aluminum

Buffer Internal Weights: Steel

Buffer Tip: Polymer Impact Pad

Buffer Spring: Standard AR-15 Carbine Recoil Spring

Buffer Spring Origin: Made in USA

Receiver End Plate: US Tactical AR-15/M16 Mil-Spec Receiver End Plate

Castle Nut: Davidson Defense AR-15 Mil-Spec Carbine Castle Nut

Castle Nut Color: Black

Brace: KAK Industry Blade Pistol Arm Stabilizer Brace

Brace Brand: KAK Industry

Brace Model: Blade

Brace Type: Pistol Arm Stabilizing Brace

Brace Platform Compatibility: AR-15 Pistol Configurations

Brace Buffer Tube Compatibility: Compatible Pistol Receiver Extension / Buffer Tube

Brace Mounting Style: Receiver Extension Mounted

Brace Retention System: Set-Screw Retention

Brace Configuration: Fixed-Position Stabilizing Brace

Brace Material: Reinforced Polymer

Brace Color: Black

Brace Finish: Molded Black Polymer

Brace Body Design: Lightweight Blade-Style Polymer Construction

Brace Profile: Compact Vertical Blade-Style Design

Brace Support Structure: Reinforced One-Piece Stabilizing Surface

Brace Sling Attachment: Integrated Sling Slots

Brace Upper Sling Attachment: Integrated Top Sling Slot

Brace Lower Sling Attachment: Integrated Angled Sling Slot

Brace Adjustment Method: Positionable Along Compatible Pistol Buffer Tube Before Set-Screw Lockup

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