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

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

Our Premium Billet 80% Lower has been redesigned with easier assembly in mind. This receiver has been enhanced with a threaded bolt catch release hole, as well as a threaded rear takedown detent hole. No more roll pins and loose springs!

These enhancements allow for a quicker, simpler install of your lower parts kit with fewer tools required. The Premium Billet 80% Lower comes with the needed screws for installing the threaded fittings.

80% Lower Specifications

• Compatibility: 5.56/.223, 300 BLK, 6.5 Grendel
• Construction: Billet 6061-T6 Aluminum
• Finish: Type III Hardcoat Anodizing
• Color: Matte Black
• Fitment: 100% Mil-Spec
• Fire/Safe Engraving: Yes
• Features: Broached Magwell, threaded bolt catch and rear takedown detent holes, integrated heavy-duty trigger guard
• 100% Made in the USA