Rated 5/5 based on 9 customer reviews
Item Number: 320-XCST
 Review Average:  
 Number of Reviews: 9
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Detailed Description


*Color of Tan Module may be darker in personal than depicted in photos online*

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.

Compatible with X-Compact slide and 15rd Compact magazine.

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** (Click Here for Tungsten Weight Kit)
  • Angled "Holster Cuts" on light rail to aid in snag-free, reholstering
  • Factory SIG-SAUER magazine release, spring, and lock included
  • Compatible with all standard holsters
  • Compatible with all current production, X-Series basepads


 **Not compatible with X-Five Tungsten Weight
DISCLAIMER: "SIG" is a federally registered trademark of SIG SAUER Inc. and is one of many trademarks owned by SIG SAUER Inc.

Neither Wilson Combat nor this website is affiliated in any manner with or otherwise endorsed by SIG SAUER Inc.  The use of "SIG" or "SIG SAUER" on this page is merely to advertise the sale of SIG pistols, parts, or components.  For genuine SIG SAUER Inc. products and parts, visit
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.
  • Install supplied magazine catch, spring, and lock into the WCP320 Grip Module
  • 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.


 Product ReviewsClick here to review this item
Perfect Fit
Recently acquired one of these WC Grips for my Sig P320 X-Compact - I don't have very large hands and I found the stock Sig Grip to be a bit wide and the back strap to flat and square for my hand. This WC grip fits the mold perfectly - it's slightly narrower and the thumb and finger grooves are placed perfectly - for a nice high grip and the trigger is the perfect distance for my index finger -- Wilson Combat Thank You !!!!
The X grip didn’t quite fit my hand so I switched to the Wilson Combat module. Absolutely perfect, what a pistol grip should feel like!
Perfect fit, function, and style.
I got this for my P320 X-Compact. I liked the original X-frame module from Sig, but I wanted a 2-tone look with FDE frame, and black slide so I took a chance on Wilson Combat. I'm glad I did! It really does feel better in the hand. Two big pluses over the OEM X-Frame is the small scalloped rest above the magazine release, and the slight internal flared magazine well.
This things is a perfect size. Same as the compact just a tiny bit shorter so its trimming a little weight. I have this with a 3.9 inch slide. It works perfect looks great. The rounded grip end makes this very concealable. I carry it every day!
Greatly improves control. Very comfortable and super easy install. 10 Stars!
BIG improvement!!
The contours on this grip (groove for primary hand thumb, the grip slightly tapers down towards the rear) are huge improvements for comfort and control. The texture is more aggressive than the OEM grip, in a positive way!! The extra bit of length on the back of the grip doesn't add to the overall height of the gun with a 15 rd magazine, but it adds to the comfort and overall grip enhancement. I have NO problems with 15 rd mags with my module. Best improvement for the 320!! Absolutely love this!! Wish Wilson Combat would do something for the 365 & 365XL!
Great product
All I can say is wilson combat did it right. This grip module for the p320 is truly exceptional; it's worth every penny. Feels so natural in the hands. If you opt for the x compact switching from a compact like I did and are running a tlr 1 you will need a new key for the rail. Other than that I love this grip module. I will recommend to all my sig friends.
Definitely an upgrade
A well build, easy to change upgrade. The grip angle and size are more comfortable. The stippling is more aggressive but the fact that standard mags don't fit is kind of a let down. The site claims they fit 15 round mags but they dont without changing base plates or trimming material off the bottom of the grip module.
Its what the P320 grip should've been. It fits your hand like a glove, It was a super tight fit getting it on. But that's a good thing in my opinion. It's definitely the difference in night and day it feels kinda like a 1911 in some ways but much better. And it looks great. Highly Recommend this Grip. A+ From me.