Premium Fire/Safe Marked Billet 80% Lower Assembly

Understanding the Premium Fire/Safe Marked Billet 80% Lower Assembly

The Premium Fire/Safe Marked Billet 80% Lower Assembly has become a popular choice for firearm enthusiasts who value craftsmanship, safety-focused design, and high-quality materials. In the world of firearm components, 80% lowers are well-known for their unfinished status, meaning they’re not classified as firearms under federal law. While this makes them unique, it also requires owners to understand their responsibilities.

No AR-15 build is complete without a butt stock assembly – and this one comes with all you need: Black Billet FIRE/SAFE engraved 80% lower, lower parts kit, butt stock, buffer tube assembly.
The Premium 80% Lower Fire/Safe Marked Billet has been redesigned with YOU in mind. The Premium 80% Billet has been enhanced and now offers a threaded bolt catch release hole as well as a threaded rear takedown detent hole. These enhancements allow for easy and fluid install of your AR Lower parts kit components, ending some of the most frustrating aspects of your 80% lower build. Each Premium 80% Lower Billet will come with the needed screws and hex key for install.
One (1) Black Billet FIRE/SAFE 80% Lower Receiver:
FIRE/SAFE Engraved

One (1) Butt Stock Kit:
This classic butt stock kit includes both an adjustable carbine stock and buffer tube assembly. The adjustable carbine stock is constructed from a durable polymer composite and is designed for quick adjustment. Additionally, this carbine butt stock offers three different sling attachment options.
One (1) Buffer Tube Assembly:
The buffer tube assembly provides a mil-spec diameter 7075 buffer tube, lock ring & castle nut, latch plate, buffer housing and buffer spring.
Purchase this butt stock assembly today for your next 80% lower receiver build.
Installation Instructions
Need help assembling your lower parts kit and buffer on your finished 80% lower? Read our detailed instructional guide for the lower parts kit. We now also have an even more in-depth instructional video! Watch it here for assistance.

The Premium Fire/Safe Marked Billet 80% Lower Assembly offers durability, premium machining, and enhanced safety markings for enthusiasts who value quality and responsible ownership. While it remains an unfinished and non-functional component, it still deserves careful handling, proper storage, and an understanding of legal responsibilities.