Used Sig Sauer P320 M18 9mm Handgun


Caliber – 9mm

Capacity – 17+1 / 21+1 Rounds

Barrell Length – 3.9″

Sights – SIGLITE Front / Night Sight Rear Plate

Optic Ready

Safety – Manual Thumb

Overall Length – 7.2″

Weight – 28.1oz

Magazines – (1) 17-Round Mags, (2) 21-Round Mags, Sig Hard Case

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This is a previously owned and used firearm. The Firearm pictured is the exact one you are ordering. You can expect various levels of cosmetic and use wear patterns, but an otherwise fully functional firearm. Shark Coast Tactical does not keep a record of how long the guns were in use or potential round count through the firearm. These firearms are sold as-is and include any accessories that may be shown in the pictures. All sales are final.

The M18 was recently issued to all branches of the U.S. Military and was chosen as the official sidearm of the U.S. Marine Corps. The P320-M18 is the commercial version that brings the same unprecedented accuracy, extreme reliability and unmatched durability the military demands.

The P320-M18 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 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…chosen by the U.S. Marine Corps and the U.S Military, now available to you for the first time.

Additional information


Sig Sauer




17 Rounds, 21 Rounds

Firearm Type