Contract Overrun Sig Sauer P320 M18 9mm “TC” Serial Number Prefix

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These are genuine contract overrun pistols for the US Government. They are NOT replicas or commemorative pistols.

They have a “TC” serial number prefix and have the 6ZWB1 CAGE code and NSN number on the left side of the slide.

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This Package Contains ONE M18.
These M18s are manufactured on the MHS line at SIG. The MHS Line consists of very small group of folks that are the only folks authorized by the US government to build their M18s. These are not replica M18s.
these are the actual M18s that are built for the Government. The controls and internals are 100% same as what is issued and used in the US Military.
This item is NOT the Commercial P320 M18 or the M18 Commemorative. This firearm is still in the blue bag as are the two 21 round magazines. The hang tag with the serial number has a star stamped on it.
Built with the exact same parts as the MHS M17 / M18 – black controls.
Built on the same production line as the MHS M17 / M18
Range tested to the same production standards as the MHS M17 / M18
Packaging is 99% the same a MHS M17 / M18
Added in commercial packing items: chamber flag and commercial P320 – M18 owner’s manual



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 that was chosen by the U.S. Marine Corps and the U.S Military is now available to you for the first time.


  • Brand: Sig Sauer
  • Model: P320 M18
  • Caliber: 9mm
  • Capacity: 17 or 21
  • Barrel Length: 3.9″
  • OAL: 7.2″
  • Frame Size: Carry
  • Frame Material: Stainless Steel
  • Barrel Material: Carbon Steel
  • Finish: Coyote PVD
  • Accessory Rail: M1913
  • Trigger: Standard
  • Weight: 28.1 oz.

Additional information

Weight 310 oz
Dimensions 12 × 12 × 6 in


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