SIG SAUER P226 MK25 9mm Pistol

SIG SAUER P226 MK25 9mm Overview

The SIG SAUER P226 MK25 brings the full-size P226 platform together with the distinctive configuration associated with the U.S. Navy’s special-warfare sidearm. This factory model is chambered in 9mm Luger and uses SIG’s traditional double-action/single-action operating system. Its 4.4-inch carbon-steel barrel, alloy frame, and Nitron-finished stainless-steel slide create a service-size pistol built around durability, controllability, and familiar P-Series handling.

This listing is for manufacturer part number MK-25, UPC 798681450695. It is the standard 15-round configuration and includes three steel magazines. SIG SAUER identifies the model with the anchor engraving on the left side of the slide and a UID label, details that distinguish the MK25 from other P226 variants.

Traditional DA/SA Operation

The P226 MK25 uses a double-action/single-action trigger with a standard curved trigger shoe. With the hammer safely lowered by the decocking lever, the first trigger press is double action; subsequent shots operate in single action as the cycling slide cocks the hammer. The frame-mounted decocker allows the shooter to lower the hammer without pressing the trigger. This model does not use a manual thumb safety, so careful handling, a suitable holster, and strict trigger-finger discipline remain essential.

The controls follow the established P226 layout, making this pistol a natural fit for shooters who prefer a metal-framed service handgun and a traditional hammer-fired action. The full-size grip and 34-ounce factory weight help provide a stable shooting platform, while the 15+1 capacity balances duty-style dimensions with practical ammunition capacity.

Service-Oriented Construction

SIG SAUER equips the MK25 with a stainless-steel slide finished in black Nitron and a hard-coat-anodized alloy frame. The 4.4-inch carbon-steel barrel is not threaded. Factory documentation also identifies phosphate treatment associated with the MK25 configuration, supporting the model’s service-oriented approach to corrosion protection. Black polymer grips complete the exterior and preserve the recognizable P226 profile.

An M1913 accessory rail is machined into the frame for compatible weapon lights and other rail-mounted equipment. Unlike current optic-ready variants, the MK25 is a fixed-sight service configuration and is not factory cut for a slide-mounted optic. That straightforward setup suits owners who want the classic P226 arrangement without an installed electronic sight or optic plate system.

SIGLITE Night Sights

Factory SIGLITE night sights provide a familiar three-dot sight picture with low-light visibility. SIG lists a 6.3-inch sight radius for the MK25, complementing the full-size slide and 4.4-inch barrel. The sights, balanced frame, and longer service-pistol dimensions make the MK25 well suited to deliberate range work, defensive training, and users who value a conventional iron-sight system.

Key Features

• 9mm Luger chambering with 15+1-round capacity
• Traditional double-action/single-action trigger system
• Frame-mounted decocking lever; no manual thumb safety
• 4.4-inch carbon-steel barrel
• Black Nitron-finished stainless-steel slide
• Hard-coat-anodized alloy frame with black polymer grips
• SIGLITE night sights with a 6.3-inch sight radius
• M1913 accessory rail
• Anchor engraving and UID identification label
• Three 15-round steel magazines included

Factory Dimensions and Configuration

Who the P226 MK25 Is For

The MK25 is a strong choice for collectors drawn to the P226’s military-service lineage, experienced shooters who prefer a DA/SA hammer-fired pistol, and range users who want a substantial all-metal handgun with proven P-Series ergonomics. Its factory night sights and accessory rail make it ready for a conventional defensive setup, while the model-specific anchor and UID markings preserve the identity that sets the MK25 apart.

Magazine-capacity and firearm-transfer rules vary by jurisdiction. Confirm local requirements before ordering, and use only compatible accessories, magazines, and ammunition. Always follow the manufacturer’s manual and established firearm-safety practices.