80% Lower (Fire/Safe Marked) w/ Mil-Spec AR15 Lower Parts Kit, Magpul® MOE® Grip & MOE® Trigger Guard | Polymer80
About this product
Complete AR-15 80% Lower Build Kit with Magpul Upgrades
Experience the ultimate convenience with our most popular forged 80% lower bundle, designed for DIY enthusiasts and builders. This all-inclusive kit features a high-quality 80% lower receiver made from forged 7075-T6 aluminum with Type III hard anodizing for superior durability. It includes a mil-spec lower parts kit with precision laser-cut components, plus premium Magpul MOE® upgrades for enhanced ergonomics and performance. Perfect for building a custom AR-15 in calibers like 5.56, .223, 300 BLK, or 6.5 Grendel, this kit ensures a reliable and professional-grade build.

Key Features and Technical Specifications
- 80% Lower Receiver: Forged 7075-T6 aluminum, Type III hard anodized, black finish, fire/safe marked, broached magwell, 100% mil-spec, made in the USA.
- Lower Parts Kit: Includes bolt catch, hammer, trigger, springs, detents, pins, and an A2-style pistol grip for complete assembly.
- Magpul MOE Components: MOE AR15/M4 grip for improved comfort and control, and MOE enhanced polymer trigger guard for durability and ease of installation.
- Compatibility: Designed for AR-15 platforms, supporting various calibers and ensuring seamless integration with standard upper receivers and buffers.
Why Choose This Kit?
Built with expertise from Polymer80, a trusted name in firearm components, this kit offers exceptional value and quality. The inclusion of Magpul parts elevates your build, providing modern ergonomics and reliability. Whether you’re a first-time builder or an experienced gunsmith, our easy-to-follow instructions guide you through each step, making the process straightforward and rewarding. This kit is ideal for those seeking a personalized AR-15 with top-tier components, all in one package.
Assembly and Support
Need help? Refer to our detailed instructional guide for step-by-step assembly tips, tool recommendations, and best practices. This ensures a safe and successful build, adhering to industry standards and enhancing your shooting experience.
Specs at a glance
What's in the box
- 80% Lower (Fire/Safe Marked) w/ Mil-Spec AR15 Lower Parts Kit, Magpul® MOE® Grip & MOE® Trigger Guard | Polymer80