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(USED) Sig P320 M18 chambered in 9mm w/ 3.9" barrel. Includes 1 of each 17/21 rds magazines. Comes standard with SIGLITE night sights and a removable night sight rear plate. The slide is optic-ready and directly compatible with the ROMEO1 PRO. The M18 was recently issued to all branches of the U.S. Milita