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Spike’s Tactical Crusader AR-15 Rifle Lower Build Kit, Magpul MOE RL Carbine Stock

Part Number: S-PI-R-LR15-66178
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Spike's Tactical Crusader AR-15 Rifle Lower Build Kit, Magpul MOE RL Carbine Stock

This is a complete lower build kit built around Spike's Tactical's Crusader lower receiver. It includes a Davidson Defense mil-spec lower parts kit, buffer tube, buffer, recoil spring, end plate, castle nut, and a Magpul MOE RL carbine stock. Everything you need to finish a lower receiver except the stripped lower itself, which comes already machined and ready to assemble.

Key Features

  • Spike's Tactical Crusader STLS022 lower receiver with hard coat anodized finish
  • Davidson Defense 31-piece mil-spec lower parts kit with complete fire control group
  • Davidson Defense heavy-duty 6-position carbine buffer tube
  • Standard carbine recoil buffer and spring included
  • Magpul MOE RL adjustable carbine stock with reversible adjustment lever
  • Multi-caliber marked lower receiver compatible with standard AR-15 pattern magazines
  • Crusader shield engraving with selector markings in English and Latin

Perfect For

  • Builders completing a lower receiver for the first time
  • Those wanting a quality mil-spec lower build without custom features
  • Shooters who prefer the Magpul MOE RL stock's adjustability and cheek weld design
  • Anyone building a standard AR-15 platform rifle

Crusader Lower Receiver Design

The Spike's Tactical Crusader lower features a distinctive crusader shield and cross logo along with selector markings that read "PAX PACIS," "BELLUM," and "DEUS VULT" on one side, with English translations "PEACE," "WAR," and "GOD WILLS IT" on the opposite side. The receiver is machined from aluminum and finished with hard coat anodize in black. It's marked for multi-caliber use and maintains full compatibility with standard AR-15 pattern magazines and fire control components.

Magpul MOE RL Stock Features

The included Magpul MOE RL is an adjustable carbine stock with a reversed front-mounted adjustment lever that lets you change length of pull while maintaining cheek weld. The stock spans from approximately 10.5 inches collapsed to 13.8 inches extended, giving you a 3.3-inch adjustment range. It features an enlarged sloping cheek-weld surface, anti-slip rubber buttpad with rollover toe for easier shoulder transitions, and a rear M-LOK slot that functions as a footman's loop for sling attachment. The stock is made in the USA from reinforced polymer and weighs just 8.3 ounces.

Buffer System and Assembly Components

The kit includes a Davidson Defense heavy-duty 6-position carbine receiver extension machined from 6061 aluminum with type II anodize finish. The standard carbine recoil buffer is made from 6061 aluminum with steel internal weights and a polymer impact pad. The buffer spring is a standard AR-15 carbine recoil spring made in the USA. A US Tactical mil-spec receiver end plate and Davidson Defense mil-spec castle nut round out the buffer system components.

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

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 Heavy-Duty 6-Position Carbine Receiver Extension

Buffer Tube Type: Mil-Spec Carbine

Buffer Tube Material: 6061 Aluminum

Buffer Tube Construction: Heavy-Duty Machined Aluminum

Buffer Tube Finish: Type II Anodized

Buffer Tube Color: Black

Buffer Tube Profile: Mil-Spec Diameter Carbine Receiver Extension

Buffer Tube Adjustment Positions: 6

Buffer Tube Outer Diameter: 1.145"

Buffer Tube Inner Diameter: 1"

Buffer Tube Length: 7.15"

Buffer Tube Weight: 3.8 oz.

Buffer Tube Stock Compatibility: Mil-Spec Diameter Adjustable Carbine Stocks

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

Stock: Magpul MOE RL Carbine Stock

Stock Brand: Magpul

Stock Model: MOE RL

Stock Manufacturer Part Number: MAG1440

Stock Type: Adjustable Carbine Rifle Stock

Stock Platform Compatibility: AR-15 / M4 and Compatible AR-Pattern Platforms

Stock Configuration: Collapsible / Adjustable

Stock Buffer Tube Compatibility: Mil-Spec Carbine Receiver Extension Only

Stock Adjustment: Multi-Position Length-of-Pull Adjustable

Stock Adjustment Lever: Reversed Front-Mounted Adjustment Lever

Stock Adjustment Design: Allows Length-of-Pull Adjustment While Maintaining Cheek Weld

Stock Material: Reinforced Polymer

Stock Color: Matte Black

Stock Profile: Streamlined A-Frame Profile

Stock Cheek Weld: Enlarged Sloping Cheek-Weld Surface

Stock Buttpad: Anti-Slip Rubber Buttpad

Stock Buttpad Toe: Rollover Toe for Easier Shoulder Transitions

Stock Sling Attachment: Rear M-LOK Slot Functions as a Footman’s Loop

Stock QD Sling Compatibility: Accepts Optional M-LOK QD Sling Mount

Stock Maximum Length: 7.0"

Stock Maximum Height: 5.3"

Stock Maximum Width: 1.7"

Stock Weight: 8.3 oz.

Stock Length of Pull, Collapsed: Approximately 10.5"

Stock Length of Pull, Extended: Approximately 13.8"

Stock Length of Pull Adjustment Range: 3.3"

Stock Origin: Made in USA

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