HK USP TacticalThe USP Tactical features resemble those of the Mark 23. It has been designed for users preferring a more compact pistol. High intrinsic accuracy due to o ring insert minimizing barrel play Adjustable micrometer rear sight Target trigger with trigger stop Extended magazine floor plate Extended threaded barrel Calibre: 9mm . 40 . 45 AUTO Operating principle: Recoil operated with modified Browning locking system Magazine capacity: 10 rounds (civilian