Description
Picture this: you’re piecing together your next AR-15, and the foundation is everything. You need a receiver that’s solid, reliable, and gives you the freedom to build exactly what you want—whether that’s a lightweight patrol rifle or a precision home defense platform. The core component that makes it all possible is the lower receiver. That’s where the Stag Arms 5.56/223 Stripped Lower Receiver comes in.
The Stag Arms 5.56/223 Stripped Lower Receiver is the serialized, ATF-regulated foundation for building a custom AR-15 rifle. Machined from 7075-T6 aluminum and hardcoat anodized, it accepts standard AR-15 parts kits and upper receivers to create a fully functional firearm. This stripped lower is the starting point for a personalized build, offering a blank canvas for your specific needs.
When it comes to building a rifle you can trust, the material and manufacturing process are non-negotiable. Stag Arms uses forged 7075-T6 aluminum, the same aerospace-grade alloy specified for military firearms. This isn’t a compromise; it’s the benchmark for strength and durability under recoil and hard use. The forging process aligns the metal’s grain structure, creating a receiver that can withstand the stresses of thousands of rounds. The finish is a Type III hardcoat anodizing, providing a wear-resistant, matte-black surface that stands up to the elements and holster wear far better than paint or cheaper coatings.
Compatibility is king in the AR-15 world, and this receiver gets it right. It’s built to mil-spec dimensions, which means it’s designed to work seamlessly with the vast ecosystem of AR-15 components. You can confidently pair it with upper receivers from brands like Aero Precision, Palmetto State Armory, or BCM. It accepts any standard AR-15 lower parts kit and buffer system. Here’s the thing—this mil-spec compatibility means it fits out of the box with the majority of aftermarket triggers, grips, and stocks without requiring special fitting or gunsmithing. That’s the practical advantage of a true mil-spec foundation.
| Specification | Detail |
|---|---|
| Caliber | 5.56 NATO / .223 Remington |
| Material | Forged 7075-T6 Aluminum |
| Finish | Type III Hardcoat Anodized |
| Fire Control Pocket | Machined for Semi-Auto |
| Compatibility | Mil-Spec AR-15 Platform |
| Weight | Approx. 8.0 oz (stripped) |
Let’s break down the pros and cons. The primary advantage is quality at a direct price point of $103.77. You’re getting a forged, properly finished receiver from a established manufacturer without paying for branding hype. The mil-spec design guarantees broad parts compatibility, simplifying your build process. The potential drawback? It’s stripped. You need to source a parts kit, buffer tube assembly, grip, and stock—which is the whole point for a builder, but a consideration for a first-timer. You also must complete the transfer through a licensed FFL, as this is the legally defined firearm component.
So who is this for? It’s for the shooter who understands that the lower receiver is the heart of the rifle and won’t cut corners. It’s for the Missouri hunter building a lightweight .223 for coyotes, the home defender who wants a specific trigger and stock combo, or the enthusiast who finds value in the assembly process itself. This receiver provides a trustworthy, no-nonsense starting block for a rifle configured to your exact specifications, and it’s available at firearms-missouri.com for Missouri residents and nationwide.
Frequently Asked Questions
Q: Is this considered a firearm, and how do I purchase it?
A: Yes, the stripped lower receiver is the serialized part legally classified as a firearm. Purchasing requires shipment to a licensed FFL dealer in your state, who will then conduct the mandatory background check before transferring it to you.
Q: What parts do I need to complete this into a functional lower?
A: You will need a Lower Parts Kit (LPK), which includes the trigger, hammer, safety selector, and all pins and springs; a buffer tube kit (buffer tube, spring, buffer, and end plate); a pistol grip; and a stock. These are all widely available components.
Q: Can I build a pistol or a rifle with this lower?
A: This receiver can be built into either a pistol or a rifle, provided you follow all applicable federal and state laws. The initial configuration is critical—if you first build it as a rifle, it must remain a rifle. Legal advice specific to your build intent is recommended.
Start your build on a solid foundation. See the Stag Arms Stripped Lower Receiver product page to check current availability.
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