I’ve got a gen 1 I think that has Zev trigger, barrel, mag well. Trijicon rmr. Was my tracking gun for a while. Frame is stippled which makes holding it super easy
I've got G4 bastard Glock 20. Large frame Lower on a Stock G4 complete slide. Fired for function only, flawless function. Standard sights no box, 1 Mag. Lost interest in the build. $500 shipped