Voluntary Upgrade Program

P320? - U.S. and Canadian Military & Law Enforcement

SIG SAUER is offering a voluntary program for P320 pistols. This will include an alternate design that reduces the physical weight of the trigger, sear, and striker while additionally adding a mechanical disconnector.

The following groups/individuals should use the information on this page to enroll in the P320 Voluntary Upgrade Program.

  • U.S. Federal Agency/Military
  • U.S. and Canadian law enforcement – including first responders
  • Canadian consumers

Steps To Upgrading Your SIG SAUER P320 Pistol


  1. Have the contact information of the authorized official for your agency available.
  2. For Law Enforcement – please call 603-610-3820 M-F, 8:30am – 5:00pm EST
  3. For Military and Federal – please call 603-610-3819 M-F, 8:30am – 5:00pm EST



  1. Have your P320 serial number and address available.
  2. On the right, Select which group you belong to, then select “Individual”. Then enter your serial number to check if your P320 has already been upgraded.
  3. If your P320 has not been upgraded please contact customer service at 603-610-3000 option 1 8:00am – 5:30pm EST Monday – Friday.

If you run into any issues, please call Customer Service and they will help you through the process. Customer Service can be reached at (603) 610-3000 Option 1, from Monday through Friday, 8:00 a.m. through 5:30 p.m. EST.

P320 Upgrade Registration (LE/Mil/Gov)

How to locate your P320 Serial Number

Your P320 serial number can be found by looking on the right side of the pistol grip. The serial number will be stamped into the receiver. This number should be entered into the first entry field of the form. SKU will automatically populate if your P320 is on a qualified list of U.S. Domestic consumer serial numbers.

With some exceptions, most U.S. Domestic Consumer P320 serial numbers begin with “58A”, “58B”, or “58C”, followed by six numbers.

  • Example: 58Axxxxxx

NOTE: There are no “i”s or “o”s in the numerical portion of the serial number.