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*WASHINGTON STATE RESIDENTS ONLY* LAST CALL - All MAGAZINES and IN-STORE firearms orders with Magazines over 10 rounds must be place by 11:59pm PST, June 28th, 2022

Sig Sauer P320-M18 9MM Pistol


In stock
Only 3 left

Ships from Distribution Facility

FFL Required Before Shipping.
Please have your dealer email a copy of their FFL to [email protected] or fax it to 253-218-2998, referencing your name and order number.


Due to the ongoing COVID-19 pandemic limiting Sig's ability to produce magazines, P365s and P320s may only ship with a single magazine. Handguns that ship with a single magazine will come with a voucher from Sig that can be redeemed for the additional magazines once full production has resumed

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.  


  • Caliber: 9mm
  • Mags Included: (1) 17rd / (2) 21rd Steel Mags
  • Sights: SIGLITE Front / Night Sight Rear Plate
  • Threaded Barrel: No
  • Pistol Size: Carry
  • Overall Length: 7.2 in
  • Overall Width: 1.6 in
  • Height: 5.5 in
  • Barrel Length: 3.9 in
  • Weight: 28.1 oz
  • Sight Radius: 5.8 in
  • Accessory Rail: M1913
  • Trigger Action: Striker
  • Trigger Type: Standard Curve
  • Grip Module: Carry Polymer Medium:
  • Grip Type: N/A
  • Grip Color: Coyote Tan
  • Barrel Material: Carbon Steel
  • Frame Finish: Stainless Steel
  • Frame Material: Stainless Steel
  • Slide Finish: Coyote PVD
  • Slide Material: Stainless Steel
More Information
SKU 320CA-9-M18-MS
Product Type Handgun
Manufacturer Sig Sauer
Caliber 9mm
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