TMP Barreled upper, .45 cal threaded 16mmx1LH and tri-lug barrel with barrel pin and ejector installed, Front and rear sights, Charging handle, cocking tube and handstop included and installed. These have the correct size ejection port for all the pistol calibers, 9mm, 40, 45, 357, 10mm just add a complete bolt carrier, recoil rod and spring assembly and modified UMP lower and your ready to go.