Rated 5/5 based on 9 customer reviews
Item Number: 320-FST
 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.

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, re-holstering
  • 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
Excellent Grip Module for Sig P320 X Full
WOW, I actually was fine with the OEM Sig grip, but just for "the heck of it" and they were on sale, I purchased this WC grip module in tan for my full sized X Sig P320. Man, do I love this grip! Texture is more aggressive and the grip is a big fuller in my hands. Love the "new look" of black & tan. The tan is darker, which I prefer, than my computer makes it. This is a really great grip module that I highly recommend!
Upgrade your P320/ M17
I love my M17 with a no safety version. But the grip just seemed a bit too big for me. I bought the Wilson Combat grip frame and oh what a difference. I shot OK with the original grip frame. However I probably increased my accuracy considerably with his grip frame. I absolutely love it. Very easy to switch out as well. Just be aware it is a slightly different FDE color than the original P320 or M17. Not a knock on it just something to be aware of. Also, most pistols I use end up getting a Talon type grip, but not with this one. And I'm glad so I don't have to cover up the beauty of the grip as it is. To me that doesn't matter much with the black guns, but once you get different colored grips it does make a difference aesthetically. I am very happy with this purchase.
A GREAT improvement
This new grip module is a great improvement over the Sig factory M-18 module. Ergonomically it fits my hand way better. Better grip; more comfortable trigger guard; and higher hand on the pistol - makes it more accurate and comfortable to shoot. The color is NOT "TAN" - it's exactly "MagPul Flat Dark Earth" - and it's the exact match to Sig's (tan) Romeo 1 Pro (which is really FDE). The Sig M-18 factory Module is actually "Coyote Tan". With the "Coyote Brown" slide (Factory on the M-18) now, it's a two-tone color scheme - the Romeo and Grip Module being the same and contrasting the slide. I LOVE IT. Appearance, Fit and Function are Fantastic. Can't wait to see what Wilson comes up with next for the P320.
Grip Module
Huge improvement over the factory grip on my P320. Much slimmer and better contour. Feels like a new gun. Love it. Highly recommended.
Grip arrived yesterday. Called Wilson to make sure they had not introduced a 3rd color - dark FDE which would have been my choice anyway. Was told they had an error with the flash camera on all their photos, that their two colors are black and "tan" which actually means dark FDE, NOT Coyote as depicted. If you want FDE, it is a great grip. If you are expecting Coyote light Tan, this product is not tan.
Top Notch
Was waiting for them to come out and got one of the first ones. Fit was perfect and shot an USPSA match 2 days after receiving the frame - zero issues. One happy camper here!
All around Good
Initial FCU insertion is tight, let it sit over night and it is pretty easy to remove and reinstall afterwards. The polymer starburst provides a strong bite into the hand, the gun will not move (I have not tested it yet with wet or sweaty hands). It is compatible with TRex Ragnarok holster w/ and w/o light attachment. I definitely feel a lot more control over the gun. Got a lot of "what are you shooting?" at the range today so it definitely stands out. Pretty happy with it so far.
Buy it
I have an early p320 TacOps. Other than the fact you can’t drop it, it’s been flawless and it’s one of my favorite polymer guns. The WC frame made it my favorite. My 1st gen OEM 21 rd mag extensions work perfectly as well. Buy it, makes a good gun great. Well done WC.
Made a good gun great!
I've had my P320 for 3 years. The medium grip frame was too big and the small one was too small. I received my WC grip today. It was a perfect fit with the trigger group just like the ones from Sig. This grip fits my hand perfect, it lets me get higher and deeper into the gun and provides a more secure and stable grip due to the angles and texture.