What is the M17 Caliber X-Change Kit?
By using this kit, the P320 can be converted into a non-manual safety version of the renowned M17.
The Modular Handgun System (MHS) contract was awarded to the SIG SAUER M17 for the United States Army following a highly competitive review process. The M17 is a P320-based platform that offers unique modularity, uncompromising performance, and unmatched capability. In terms of specification, the P320 closely follows the U.S. Army’s M17.
What are the benefits of the Sig M17 Caliber X-Change Kit?
The Sig M17 Caliber X-Change Kit includes a slide that is properly marked for use with the M17 handgun. This makes it easier to transition between the firearm and handgun, increasing accuracy and safety. Additionally, the kit comes with a spring and guide rod that can be customized to accommodate different load types, making it suited for both range shooting and self-defense.
How to install the Sig M17 Caliber X-Change Kit?
- Step 1: Remove the magazine and clear the chamber.
- Step 2: Disassemble the pistol by removing the slide assembly, from the Fire controls unit (FCU) and Grip Module. Lock the slide to the rear and rotate the takedown lever to the down position. Then Grab the slide and slowly pull it back then forward to remove the slide from the frame (FCU & Grip Module)
- Step 3: Remove the FCU from the Grip Module. With the takedown lever in the down position from the other side of the lever (side opposite the lever) push the lever out of the grip module.
- Step 4: Remove the FCU (Metal piece in the grip module) by pushing it forward towards the front of the grip module. This can be difficult sometimes as the grip and FCU can be a tight fit. Sometimes by pushing the back of the trigger forward you can help get things moving.
- Step 5: Re-Assembly with the new M17 Conversion kit. Put the FCU that you removed from your old grip into the grip provided with the Caliber X-Change Kit
- Step 6: Once the FCU is in the new Grip Module put the takedown lever back in the opposite of how you took it out in Step 3
- Step 7: Once the FCU is secure in the new Grip Module ensure the takedown lever is in the down position. You can install the new Slide onto the Frame (FCU & Grip module) to ensure the barrel and recoil assembly are in the proper orientation when you install. put the slide onto the rails and pull it all the way back and lock it back with the slide lock.
- Step 8: Rotate the takedown lever up (parallel to the slide)
- Step 9: While holding the slide pull back lightly to release the slide lock and allow the slide to go forward.
- Step 10: do a function check according to the owner’s manual

FAQs
Is the M17 Caliber X-Change Kit a good choice for an individual looking to upgrade their firearm?
The M17 Caliber X-Change Kit is a great choice for an individual looking to upgrade their firearm.
What does the Sig M17 Caliber X-Change Kit include?
Desert Depot Arm’s kit includes the slide, barrel, recoil assembly, carry grip module, and (1) 17-round magazine, and (2) 21-round magazines are all included in the kit.
How much does the Sig M17 Caliber X-Change Kit cost?
The Sig M17 Caliber X-Change Kit is priced at $549 (watch for sales too) and it’s an excellent choice for anyone looking for a modular firearm that can be customized to fit their individual preferences.
Where can I buy the Sig M17 Caliber X-Change Kit?
Desert Depot Arm regularly stocks this kit. Click Sig P320 to M17 Conversion Kit
How do I know if the Sig M17 Caliber X-Change Kit is compatible with my gun?
If you have a stock Sig Sauer P320 this conversion kit is compatible with it.
What if I have problems with the Sig M17 Caliber X-Change Kit?
If you’ve purchased your kit through Desert Depot Arms, email support@desertdepotarms.com or use the contact page, to open a ticket. Someone will respond and address the issue. Please read the return and refund policy for more information. Upon receiving your kit, be sure to test it out immediately as there is a 15-day return policy and you won’t want to miss that window.

