Spikes Tactical “Spider” Stripped Lower Receiver – Multi-Cal, 7075-T6, Black Anodized w/ Color Fill (STLS019CFA)
Build your next AR-15 on a receiver that stands out for both quality and style. The Spikes Tactical Spider Stripped Lower Receiver Multi-Caliber (STLS019CFA, UPC 815648021771) is a premium, forged 7075-T6 aluminum lower with a black anodized finish and factory color-filled markings, featuring the iconic Spikes Tactical Spider logo on the magwell.
Designed for AR-15 pattern builds and marked “MULTI” for caliber, this lower is an ideal starting point for anything from a lightweight 5.56 carbine to a dedicated .300 BLK, 6.5 Grendel, or custom AR project—subject to all applicable laws and safe gunsmithing practices.
Key Features – Spikes Spider Stripped Lower (STLS019CFA)
Model: Spider Stripped Lower Receiver
Platform: AR-15 pattern
Caliber Marking: Multi-Cal (compatible with standard AR-15 calibers when built correctly)
Material: 7075-T6 forged aluminum – the same grade used in mil-spec receivers
Finish: Class III hard coat anodized, black
Special Feature: Factory color-filled markings and Spider logo
Style: Stripped lower (no internal parts, no stock, no grip)
Manufacturer Part #: STLS019CFA
UPC: 815648021771
7075-T6 Forged Aluminum – Strong, Lightweight & Battle-Proven
The Spikes Spider lower is forged from 7075-T6 aluminum, the gold standard for quality AR receivers:
Higher strength-to-weight ratio than 6061 aluminum
Used in mil-spec rifles for its durability and impact resistance
Handles the stresses of high round count use, training, and field conditions
For builders who don’t want to compromise on the foundation of their rifle, 7075-T6 forgings are the go-to choice.
Hard Coat Anodized Black – Durable, Corrosion-Resistant Finish
This lower wears a Class III hard coat anodized black finish that:
Provides excellent corrosion and wear resistance
Offers a clean, low-glare, tactical appearance
Pairs perfectly with most black and FDE uppers, rails, and furniture
The anodizing also protects the aluminum from environmental exposure, solvents, and normal handling, helping your lower stay looking sharp for years.
Iconic Spikes Spider Logo with Color Fill
What sets this model apart visually is the Spikes Tactical Spider logo and color-filled markings:
The Spider emblem on the magwell gives your build a distinct, aggressive look
Color-filled selector markings and logo add visual pop and easier reference when checking safety position
Ideal for shooters who appreciate custom aesthetics straight from the factory, without aftermarket engraving or fill work
It’s a standout option if you want your AR to be instantly recognizable as a Spikes build.
Multi-Cal Marking – Build the AR You Want
The lower is marked “MULTI” for caliber, which allows flexibility in what you build on top of it (where legal and mechanically compatible):
Standard 5.56x45mm NATO / .223 Rem builds
.300 AAC Blackout, 6.5 Grendel, 6mm ARC, .350 Legend, and other standard AR-15 compatible calibers (with the correct upper, BCG, barrel, and mags)
Custom configurations tailored to your specific mission—home defense, training, hunting, or competition
Important: Always ensure your upper, components, and ammunition are correctly matched and installed by a qualified person, and comply with all federal, state, and local laws.
Mil-Spec Dimensions – Compatible with Quality AR Components
The Spikes Spider STLS019CFA follows mil-spec dimensions for an AR-15 lower receiver, offering:
Compatibility with most mil-spec and high-quality aftermarket parts kits, triggers, and stocks
Proper fit with mil-spec upper receivers and many commercial uppers
A reliable foundation for standard buffer systems, receiver extensions, and accessories
Whether you’re building a duty-style carbine, a precision setup, or a fun range rifle, you can pair this lower with your favorite components confidently.
Stripped Lower – Start Your Custom Build Right
As a stripped lower, this receiver includes the serialized lower shell only (no lower parts kit, trigger, buffer tube, or stock):
Gives you complete freedom to choose your trigger, safety, mag release, and furniture
Perfect for builders who want to hand-pick every component for performance, feel, and budget
A great base for both first-time builders and experienced AR enthusiasts planning a high-end custom rifle
The lower is the firearm-regulated component, so always purchase and transfer it through appropriate legal channels.
Ideal for Custom AR-15 Builds
The Spikes Spider Stripped Lower Receiver is an excellent choice for:
Defensive & Duty-Style Builds: Pair with a quality upper, trigger, and stock for a serious defensive carbine.
Range & Training Rifles: Durable enough for high-volume classes and practice.
Hunting & Field Guns: Use Multi-Cal flexibility to set up a .300 BLK, 6.5 Grendel, or other hunting caliber build.
Themed & Matching Builds: Match with other Spikes Tactical components and furniture for a cohesive, branded rifle.
If you want both performance and personality in your AR-15, this Spider lower checks both boxes.
Compliance & Safety Notes
The lower receiver is considered a firearm under U.S. law and must be transferred through a licensed FFL.
Always comply with all federal, state, and local regulations regarding firearm ownership and configuration.
Assembly and modification should be done safely and correctly, ideally by a qualified armorer or gunsmith if you’re not experienced.
Always practice safe firearm handling and use quality, in-spec parts and ammunition.
Technical Summary – Spikes Tactical Spider Lower STLS019CFA
Manufacturer: Spikes Tactical
Model: Spider Stripped Lower Receiver
Part Number: STLS019CFA
UPC: 815648021771
Platform: AR-15
Caliber Marking: Multi-Caliber
Material: 7075-T6 forged aluminum
Finish: Black hard coat anodized, class III
Special Feature: Color-filled Spider logo and selector markings
Configuration: Stripped lower (no LPK, no stock, no grip)
If you’re ready to start your next AR build on a foundation that’s strong, reliable, and unmistakably Spikes, the Spikes Spider Stripped Lower Receiver Multi-Cal 7075-T6 Aluminum Black Anodized with Color Fill (STLS019CFA) is the perfect serialized component to anchor your custom rifle project.
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