Build Your Custom AR-15 with the MAS Defense 80% Skeleton Forged Lower Receiver
Take your AR-15 build to the next level with the MAS Defense 80% Skeleton Forged Lower Receiver in Flat Dark Earth (FDE). This precision-engineered component offers the perfect balance of lightweight design and rugged durability, making it an ideal choice for firearms enthusiasts, DIY builders, and competitive shooters alike. Crafted from high-quality forged aluminum, this lower receiver provides a solid foundation for your custom rifle while reducing overall weight for enhanced maneuverability.
Why Choose This 80% Lower Receiver?
As experienced firearms specialists at Texas Gun Store, we recommend this MAS Defense lower receiver for several key reasons. First, its 80% completion status means you can legally finish the machining yourself, offering a rewarding DIY project that complies with ATF regulations. The skeletonized design removes excess material without compromising structural integrity, resulting in a lighter receiver that doesn’t sacrifice strength. The Flat Dark Earth finish isn’t just for looks—it provides excellent corrosion resistance and blends seamlessly with popular FDE accessories and components.

Key Features and Benefits
- Forged Aluminum Construction: Provides superior strength and durability compared to billet or polymer alternatives
- Lightweight Skeleton Design: Reduces overall rifle weight for better handling and reduced fatigue
- 80% Completion: Allows for legal personal finishing while avoiding serialization requirements
- Flat Dark Earth Finish: Offers excellent corrosion resistance and tactical aesthetics
- Precision Machining: Ensures proper fit with standard AR-15 parts and accessories
- Made in USA: Manufactured with American materials and craftsmanship
Technical Specifications and Compatibility
This lower receiver is designed to work seamlessly with standard AR-15 components. The forged 7075-T6 aluminum construction meets Mil-Spec standards for hardness and durability. The skeletonized pattern has been carefully engineered to maintain critical structural areas while removing non-essential material. When properly finished and assembled, this receiver will accept all standard AR-15 upper receivers, fire control groups, buffer tubes, and stock systems.
Who Should Consider This Product?
This 80% lower receiver is perfect for: firearms enthusiasts who enjoy DIY projects, competitive shooters looking to reduce rifle weight, preppers building reliable defensive weapons, and collectors creating unique custom builds. The FDE finish makes it particularly appealing for those building tactical or desert-themed rifles.
Why Buy from Texas Gun Store?
At Texas Gun Store, we combine decades of firearms expertise with exceptional customer service. Our team includes experienced gunsmiths and competitive shooters who test and verify the products we sell. We stand behind every item with our satisfaction guarantee and provide expert advice to help you complete your build successfully. Visit our store to explore more AR-15 components and accessories for your next project.
Frequently Asked Questions
Q: Is this lower receiver legal to purchase?
A: Yes, 80% lower receivers are legal to purchase in most states without an FFL transfer because they’re not considered firearms until completed. However, always check your local and state regulations before purchasing.
Q: What tools do I need to finish this 80% lower?
A: You’ll need a drill press or milling machine, appropriate drill bits and end mills, a vise, and proper safety equipment. Jigs are available separately to guide the machining process.
Q: Does this come with any warranty?
A: MAS Defense products typically come with a manufacturer’s warranty against defects in materials and workmanship. Contact us for specific warranty details.
Q: Can I have this shipped directly to my home?
A: Yes, 80% lower receivers can be shipped directly to your door in most states since they’re not classified as firearms.
| Material | Forged 7075-T6 Aluminum |
| Finish | Flat Dark Earth (FDE) Anodized |
| Completion Status | 80% (requires finishing) |
| Weight | Approximately 6-8 oz (varies with finishing) |
| Compatibility | Standard AR-15/M4 Pattern |
| Manufacturing | Made in USA |
| Fire Control Pocket | Requires machining |
| Trigger Pin Holes | Requires drilling |
| Safety Selector Hole | Requires drilling |
| Magazine Well | Pre-machined |
| Pistol Grip Threads | Pre-tapped |
| Buffer Tube Threads | Pre-tapped |





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