Description
The Spikes Water Boarding Instructor Stripped Lower is a mil-spec AR-15 lower receiver, finished in black hardcoat anodizing and marked “Multi-Cal” for versatility. It’s the foundational piece for a custom rifle build, requiring you to add your own parts kit, trigger, stock, and buffer system. At $108.09, it’s a solid, no-frills canvas for your next project. I’ve built on a few of these, and they provide that classic Spikes Tactical aesthetic with the functional backbone you need. The price point makes it an accessible entry into building a rifle that’s truly your own.
Key Features
- Multi-Caliber Marking: Officially marked “Multi-Cal,” giving you flexibility for builds in 5.56/.223, .300 Blackout, 9mm, and more.
- Black Hardcoat Anodized Finish: A durable Type III anodized finish that resists wear and corrosion, matching most upper receivers.
- Stripped Receiver: Comes as a blank slate, allowing you to select every internal component to your exact preference.
- Mil-Spec Dimensions: Built to military technical data package (TDP) specifications for reliable compatibility with standard AR-15 parts.
- Spikes Tactical Roll Mark: Features the distinctive “Water Boarding Instructor” graphic and branding for a unique look.
Specifications & Details
| Specification | Detail |
|---|---|
| Material | 7075-T6 Aluminum Forging |
| Finish | Black Hardcoat Anodized (Type III) |
| Caliber Marking | Multi-Cal |
| Fire Control Pocket | Mil-Spec, Auto |
| Compatibility | Standard AR-15/M16 Pattern Parts |
| Trigger Guard | Integrated, Flared |
Look, the specs tell the story: this is a workhorse lower. The 7075-T6 forging is the same material used in duty-grade rifles, and that integrated, flared trigger guard is a nice touch for gloved use. It weighs in at about 8.8 ounces stripped, giving you a baseline for your final build weight. The real benefit here is the mil-spec compatibility—it means you can confidently pair this with uppers from brands like Aero Precision, BCM, or Palmetto State Armory without worrying about fit. That said, remember this is a stripped lower, so you’ll need a lower parts kit, buffer tube assembly, and stock to make it functional.
Who This Lower Is For
This is for the builder who appreciates a bit of personality but doesn’t want to sacrifice function. It’s perfect for someone assembling their first AR and wants a proven platform to learn on, or for the seasoned enthusiast adding another dedicated lower to the safe for a specific upper. If you like the Spikes aesthetic and want a reliable foundation for a range toy, a home defense rifle, or a truck gun, this is a great starting point. It’s also ideal for Missourians looking to build a compliant rifle exactly to their local specifications.
Pros & Cons
Pros: The price is very competitive for a forged lower with this finish. The mil-spec design means it’s drop-in ready for standard components—no gunsmithing required for assembly. The Multi-Cal engraving offers future-proofing for caliber changes. The finish is consistently good and matches well.
Cons: It’s stripped, so the total cost of a complete lower will be higher once you add all necessary parts. The roll mark is bold and humorous, which might not be for everyone (though that’s part of Spikes’ charm). You’ll need to handle an FFL transfer for firearm purchases, as this is a serialized component.
Frequently Asked Questions
Q: Is this lower compatible with a 9mm AR build?
A: Yes, the “Multi-Cal” marking includes pistol calibers. You will need a dedicated 9mm AR magazine block or 9mm-specific lower parts kit for the bolt catch, and it will work with standard 9mm AR upper receivers.
Q: What parts do I need to complete this lower receiver?
A: You’ll need a Lower Parts Kit (LPK), which includes the fire control group (trigger, hammer, disconnector), safety selector, magazine catch, bolt catch, and pivot/takedown pins. You also need a buffer tube kit (buffer tube, buffer, spring, end plate, castle nut) and a stock. A pistol grip is typically included in an LPK.
Q: Does this ship directly to my door?
A: No. As a serialized firearm component, it must ship to a licensed Federal Firearms License (FFL) holder in your state. You will complete the background check and transfer paperwork with your chosen FFL dealer. We make this process straightforward and ships to Missouri and compliant US states.
So, is the Spikes Water Boarding Instructor Lower the right choice for your build? If you want a durable, mil-spec foundation with a bit of character that won’t break the bank, it absolutely is. It’s a straightforward piece that does its job without fuss, letting your choice of trigger, stock, and upper do the talking. I’ve never had one that didn’t fit out of the box with standard parts, and that reliability is what you’re paying for. Consider this your invitation to start that build you’ve been planning.
You can find the Spikes Water Boarding Instructor Stripped Lower, Multi-Cal, Black Hardcoat Anodized available at firearms-missouri.com for Missouri residents and nationwide.
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