P320 M18

The SIG Sauer P320‑M18 is the commercial counterpart of the U.S. military’s newly adopted M18 service pistol, delivering the same level of accuracy, reliability and rugged durability demanded by all branches of the armed forces, including the United States Marine Corps, which selected the M18 as its official sidearm. Built on the compact Carry-size P320 platform and finished in the distinctive Coyote‑tan coloration of the military variant, the P320‑M18 brings duty‑grade performance into civilian hands.

The pistol features SIGLITE night sights paired with a removable rear night‑sight plate, and its optic‑ready slide is designed for direct mounting of the ROMEO1PRO without the need for adapter plates. The stainless-steel slide is coated in coyote PVD, matching the Carry‑size polymer grip module. The P320‑M18 is supplied with one 17‑round magazine and two extended 21‑round steel magazines, reflecting its military loadout.

This model is equipped with a manual safety. When engaged, the safety is designed to mechanically prevent the pistol from firing even if the trigger is intentionally or unintentionally pressed. SIG Sauer emphasizes that a manual safety supplements—rather than replaces—rigorous safe‑handling practices. Because unintentional trigger activation can occur in normal handling, users must ensure that the trigger is protected from contact unless deliberately firing. Carrying the pistol with a chambered round requires attention to trigger discipline whether or not the manual safety is engaged.

Chambered in 9mm Luger, the P320‑M18 uses the striker-fired system of the P320 family and is built on a stainless‑steel internal chassis paired with a stainless‑steel Nitron‑finished frame assembly. It is fitted with a standard curved trigger and retains an M1913 accessory rail for lights or lasers. The 3.9‑inch carbon‑steel barrel combines with a compact 7.2‑inch overall length, a width of 1.6 inches and a height of 5.5 inches. Its weight is 28.1 ounces, balancing carry convenience with robust durability.

The P320‑M18 delivers the same trusted performance chosen by the U.S. Military, now made available for civilian and professional users seeking a combat‑proven sidearm in a compact, duty‑ready configuration.

Parameters:

• Caliber: 9x19
• Barrel length: 3,9" (99 mm)
• Barrel material: Carbon Steel
• Overall length: 183 mm
• Slide: Stainless Steel, Nitron® finish
• Frame material: Stainless Steel
• Grips: Polymer
• Weight: 797 g
• Trigger mechanism: SF
• Sights: Tritium SIGLITE
• Optics ready: YES
• Magazine capacity: 17 / 21 rounds
• M1913 rail
• Coloration: Coyote Tan
• Mount base for red dot sights (compatible with ROMEO1PRO a Deltapoint Pro Optics)