Wilson Combat for Sig Sauer P320 Grip Module, WC320, Full Size, Standard Safety, Tan 320-FST


In Stock

SKU: WC-320-FST Categories: ,


The impressive modular capability of the SIG-SAUER P320 is why it has become a favorite with practical shooters and it’s thoroughly tested design will be the official US Military sidearm for many years to come.

Wilson Combat has now reengineered the P320 grip frame to optimize its practical shooting potential.  This all new molded polymer grip module will enhance your grip and improve recoil control.  Our significant improvements in shape, texture and overall ergonomics will give your P320 the superb feel of an expertly hand sculpted custom gun with a simple grip change.

Our fresh look at the P320 grip module incorporates the suggestions of tactical trainers, champion shooters and firearms experts into the final product that has a look that is unmistakably “Wilson”.  We believe it is the most practical, comfortable and stylish P320 grip available and the ideal choice for practical shooting or defensive handgun use.

These are non-serialized, newly manufactured grip modules and are not a serial numbered firearm.

The Wilson Combat SIG-SAUER P320 Polymer Grip Module features:

  • Caliber availability – 9mm, .40 S&W, .357 SIG
  • Upgraded, high-cut 1911-style beavertail grip tang for smooth draws
  • Undercut front-strap and reshaped, radiused trigger guard for the highest grip possible
  • Enlarged, integrated magwell opening for fast reloads-compatible with the latest generation SIG-SAUER X-series factory basepads
  • Improved grip traction and increased grip pattern coverage with Wilson Combat’s exclusive Starburst grip pattern on the sides and aggressive texturing on the front and backstrap
  • Frame reference serrations for support hand thumb or index finger positioning
  • Internal Slots for Rod-style Tungsten Weights**
  • Angled “Holster Cuts” on light rail to aid in snag-free, re-holstering
  • Factory SIG-SAUER magazine release pre-installed
  • Compatible with all standard holsters


**Not compatible with X-Five Tungsten Weight

P320 Grip Removal/Replacement:

  • Unload and clear your pistol.
  • Remove the slide assembly and set aside.
  • Remove the takedown lever out of the factory grip from right to left and set aside. You may need to twist/tap the takedown lever out with a non-marring tool as it is retained by a spring in the chassis.
  • Lift the chassis straight up and forward out of the stock frame.
  • Reverse the process to install the chassis into the grip frame and re-install the takedown lever.
  • You may need to tap the takedown lever in place with a non-marring tool.
  • Reinstall the slide assembly and move the takedown lever into the locked position.
  • Ensure that your pistol functions properly and your magazine drops cleanly after installation of the new grip frame.
5.1″ 4.7″ 3.9″ 3.6″
320-CSB Carry, Standard, Black 17rd 4-notch Y Y N N Y ** N Y N Y N N
320-CST Carry, Standard, Tan 17rd 4-notch Y Y N N Y ** N Y N Y N N
320-CMB Carry, Manual, Black 17rd 4-notch N N Y Y N N ** N Y N N N
320-CMT Carry, Manual, Tan 17rd 4-notch N N Y Y N N ** N Y N N N
320-FSB Full. Standard, Black 17rd 6-notch Y Y N N Y N N N N N N N
320-FST Full, Standard, Tan 17rd 6-notch Y Y N N Y N N N N N N N
** MUST SWITCH FROM 15rd to 17rd magazines

Frequently Asked Questions

What calibers does the WC320 grip module work with?
9mm, .40 S&W, and .357 SIG

Will the WC320 grip module work with .45 ACP or 10mm?
No, the WC320 magwell is too small for the large caliber magazines. There are no plans to support larger calibers at this time.

Will you offer a shorter, X-Compact / Subcompact (3-notch) length lightrail?
Not at this time, however there are plans to support this in the future.

Will you offer a Compact (15rd) length grip?
Not at this time, however there are plans to support this in the future.

Will you offer a Subcompact (12rd) length grip?
No, and there are no plans to support this at this time.

What basepads work with the WC320 grip module?
The WC320 grip module is compatible with all current production, X-Series basepads.

Will the WC320 grip module work with older, first generation basepads?
No, but a competent gunsmith can modify old basepads by removing the “ears” to make them work with the WC320 grip module.

Will the WC320 grip module work with aftermarket P320 basepads or magazines?
We cannot control the quality of other manufacturers parts, and therefore can only guarantee compatability with current production SIG factory magazines and basepads, however as long as they conform to SIG factory specifications they should work.

Will the WC320 grip module work with the older, first generation slide releases?
Yes, the WC320 is compatible with the larger, first generation slide releases.

Will the WC320 grip module work with the P250?
Not out of the box, however if you would like to send in your P250 in our gunsmiths can modify the WC320 grip module to clear the double-action trigger bar of the P250.

Will the WC320 work on the P365? Will you make a grip module for the P365?
No, the WC320 grip module is not compatible with the P365, and there are no plans to make a grip module for the P365 at this time.

What material is the WC320 grip module made out of?
The WC320 grip module uses the exact same polymer material as SIG factory grip modules.

Will you offer other colors or materials (Tungsten Infused Polymer, Aluminum, Steel, etc.)?
No plans at this time.

Will the WC320 Tan grip module be an exact match to my current M17/M18 grip module & basepads?
No. Department of Defense compliance for coyote tan can vary greatly, so Wilson Combat chose to make our tan unique, and therefore the WC320 grip module may not exactly match the variety of coyote tan used on the M17/M18.

Can I get my P320 slide Armor-Tuffed to match my WC320 Tan grip module?
Yes, there are plans to support this in the future.

What size is the WC320 grip module? Small, Medium, or Large?
Measuring the circumference of the grip below the trigger guard, not including the high grip cut, the WC320 grip module is 5.4″ (137mm). That makes it approximately the same size as SIG’s small grip module, however the grip angle and shape are much closer to the timeless design of the 1911, so it’s not a direct comparison between the two.

Will my X-Five Tungsten Weight work in the WC320 grip module?
No, the WC320 Grip Module uses rod-style Tungsten Weights, similar to the X-Compact.

Additional information

Weight 8 oz

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