The Sig Sauer P226 MK25 is a full-size 9mm semi-automatic chambered in 9mm Luger. It runs double/single action, holds 10+1 rounds, and ships with a 4.4-inch barrel giving an overall length of 7.7 inches. The frame is aluminum alloy, the slide is stainless steel with a Black Nitron finish, and the grips are textured G10 polymer. Weight is 34 oz (2.2 lbs). The U.S. Navy has a long history with the P226 platform, which informs the MK25 designation. 
 

Key Specifications 

• Manufacturer: Sig Sauer 
• Model: P226 MK25 
• Caliber: 9mm Luger 
• Barrel Length: 4.4 inches 
• Overall Length: 7.7 inches 
• Capacity: 10+1 rounds 
• Weight: 34 ounces (2.2 lbs) 
• Action Type: Double/Single Action (DA/SA) 
• Frame Material: Aluminum Alloy 
• Slide Material: Stainless Steel 
• Finish Color: Black Nitron 
• Grips Material: Textured G10 Polymer 
• Sights Configuration: SIGLITE Night Sights front and rear 
   

Features 

The stainless steel slide pairs with a Black Nitron finish for corrosion resistance. The aluminum alloy frame keeps total weight at 34 oz. G10 textured polymer grips give a positive grip surface without adding bulk. SIGLITE night sights cover low-light situations. A manual thumb safety with decocking lever allows safe chambered carry and quick access when needed. This California-compliant model includes a loaded chamber indicator and magazine safety.

Users generally speak well of the P226 MK25. Build quality and durability are the most consistent positives: the pistol feels solid and holds up under sustained use. Accuracy gets frequent praise, with many owners noting easy, consistent target acquisition. The grip and ergonomics land well for most hands, and the SIGLITE sights are well-regarded for both day and low-light work.

On the critical side, the pistol's weight is a real consideration for those who carry daily. The price is routinely called out as high versus competing DA/SA 9mm options, though many buyers feel the quality justifies it. The DA/SA trigger system divides opinion: some value the safety benefit of a heavier first pull, while others need time to get the DA-to-SA transition consistent. Comparisons to other popular pistols are common, and shooters with home defense and competition backgrounds alike show up in MK25 discussions.