Sig Sauer P320-M17 9mm Luger Caliber X-Change Kit, Coyote Brown, Includes 17rd & 21rd Magazines

The Sig Sauer P320-M17 9mm X-Change Kit gives you a straightforward way to convert your existing P320 platform into a military-spec M17 configuration. This kit ships with a 4.7" slide assembly in Coyote Brown and includes both 17-round and 21-round magazines, so you get flexibility for duty, training, or sport shooting right out of the box. If you already own a P320 and want to explore the ergonomics and handling that won the U.S. Army's rigorous Modular Handgun System competition, this is the smart upgrade path.

Built around the same modular engineering that made the M17 the military's choice, the X-Change Kit maintains the P320's legendary modularity while bringing you closer to the specs of the actual service weapon. The coyote brown finish pairs durability with a professional aesthetic that works equally well at the range or in a duty holster. The kit's real value lies in its simplicity: swap components on your existing P320 firing control unit, and you've got an M17-pattern handgun configured for serious use.

One important detail: this kit is designed for 9mm, .357 SIG, or .40 S&W firing control units. If your P320 runs a .45 ACP or 10mm FCU, this kit won't work with it—compatibility matters with modular platforms, so verify your current FCU caliber before ordering.

Key Features

• 4.7" slide assembly in Coyote Brown, matching U.S. Army M17 specifications
• Includes 17-round and 21-round magazines for versatility
• Drop-in X-Change Kit design—works with compatible P320 firing control units
• Modular platform allows configuration flexibility for duty, competition, or training
• Military-proven ergonomics and design philosophy

Specifications

Frequently Asked Questions

Will this M17 X-Change Kit work with my P320?

Only if your P320 has a 9mm, .357 SIG, or .40 S&W firing control unit. The kit is not compatible with .45 ACP or 10mm FCUs. Check your current FCU caliber before purchasing.

What's included in the kit?

The kit includes the 4.7" slide assembly in Coyote Brown, one 17-round magazine, and one 21-round magazine. You'll need to have a compatible P320 firing control unit on hand to complete the build.

How does this compare to the military M17?

The P320-M17 X-Change Kit follows the specifications of the U.S. Army's M17, which was selected as the military's Modular Handgun System after a rigorous evaluation. It brings that proven design and ergonomics to your P320 platform.

What's the difference between the two magazines?

You get both a 17-round and a 21-round magazine. The 17-round offers a lower-capacity, duty-style option, while the 21-round provides greater round count for extended range sessions or training scenarios.