The P320-M18 brings the same unprecedented accuracy, extreme reliability and unmatched durability the military demands to you in a civilian version. The SIG SAUER M17 and compact variant, M18 were selected as the official sidearms of all branches of the U.S. military. The M18 was chosen as the official sidearm of the U.S. Marine Corps. The P320-M18 comes standard with an optic ready removable night sight rear plate compatible with the ROMEO1 PRO. The slide and grip module are the same coyote tan as the military version, and it includes (1) 17 round magazine and (2) 21 round magazines. The P320-M18 has a manual thumb safety. The new P320-M18… Chosen by the U.S. Marine Corp and the U.S. military, now available to you for the first time.