This is a (Glock) G43 SS80 Pistol Frame (Lower) by Freemandontask. To complete the lower you will need the SS80 Builders Tool Set found here. This frame was inspired by the Glockstore SS80 80% Lower.

Given the laws regulating the components of firearms, a Glock frame that is customizable is exactly what FOSSCAD ... We are good with tools and I’d say this build is not any harder than making an 80% ...