I BELIEVE THUS TO BE THD FINEST GLOCK I'VE BUILT IT USES GLOCK OEM PARTS INTERNALLY IN A PSA ERGONOMIC FDE FRAME WITH GOLD CONTROLS. THE MKII GLITTERY GOLD RMR LEO TACTICAL SLIDE HOLDS THE DISCONTINUED P80 CHUNK MATCH GRADE OCTAGONAL BARREL FOR AN EXTREMELY ACCURATE, RELIABLE, AND PLEASANT SHOOTING EXPERIENCE.