I made several versions of the finale angled lower design. Some of these even had a rib on both sides to fit slab sided uppers. Bushing pockets where also used to allow metal reinforcement.
![](https://hoffmantactical.com/wp-content/uploads/2021/07/Basic-Double-Rib-Hoffman-Tactical-AR-15-Lower-NO-SUPPORT-1024x743.jpg)
I made several versions of the finale angled lower design. Some of these even had a rib on both sides to fit slab sided uppers. Bushing pockets where also used to allow metal reinforcement.