New Release: MP5 Premium Fire/Safe Marked Billet 80% Lower Assembly

Just released for 2026. One of our newest catalog additions. Fully in-stock, shipping now.

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
• Color: Anodized Mil-Spec Black
• Quantity:1
• Billet 7075-T6 Aluminum
• Broached Magwell
• 100% Made in the USA
• NO FFL REQUIRED