Forged Fire/Safe Marked 80% Lower Assembly | Polymer80
Specs at a glance
About this product
Forged Fire/Safe Marked 80% Lower Assembly: Complete Your AR-15 Build
Elevate your AR-15 build with the Polymer80 Forged Fire/Safe Marked 80% Lower Assembly. This all-in-one kit includes everything you need for a seamless, no-FFL-required project: a black FIRE/SAFE engraved 80% lower receiver, a classic lower parts kit, an adjustable butt stock, and a buffer tube assembly. Crafted from premium materials and designed for durability, this assembly ensures a reliable and customizable firearm build.
Key Features and Benefits
- FIRE/SAFE Engraved Lower: Made from forged 7075-T6 aluminum with a broached magwell for enhanced strength and precision.
- Complete Lower Parts Kit: Includes all necessary components such as pins, springs, hammer, trigger, safety selector, and more for easy installation.
- Adjustable Butt Stock: Features a durable polymer composite design with multiple sling attachment points for versatility.
- Buffer Tube Assembly: Comprises a mil-spec 7075 buffer tube, lock ring, castle nut, latch plate, buffer housing, and spring for smooth operation.
- 100% Made in the USA: Backed by Polymer80’s commitment to quality and compliance.
Technical Specifications
- Material: 7075-T6 Aluminum (Lower Receiver), Polymer (Butt Stock)
- Color: Anodized Mil-Spec Black
- Compatibility: Standard AR-15 platforms
- Weight: Approximately 1.5 lbs (assembled)
- Dimensions: Varies by component; lower receiver meets mil-spec standards.
Why Choose This Assembly?
As experts in the industry, Polymer80 delivers unmatched value with this kit. It’s perfect for DIY enthusiasts looking to build a personalized rifle without FFL paperwork. The forged construction and detailed engravings add a professional touch, while the included parts reduce the need for additional purchases. Trust in our years of experience and positive customer reviews for a build you can depend on.
Installation and Support
Need guidance? Refer to our detailed installation guide or watch our video tutorial for step-by-step instructions. This assembly is designed for ease of use, making it ideal for both beginners and experienced builders.

Order your Forged Fire/Safe Marked 80% Lower Assembly today and start building with confidence. Enjoy the freedom of a custom firearm that meets your exact specifications.
What's in the box
- Forged Fire/Safe Marked 80% Lower Assembly | Polymer80