Rated 5/5 based on 24 customer reviews
Item Number: 320-CMT
 Review Average:  
 Number of Reviews: 24
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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 itís 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 ďWilsonĒ.  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 Combatís 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
Just received mine and the other reviews from the past year still hold true. Color is not as pictured. Calling it tan is a stretch. Functionally seems fine, but color did matter to me and would have liked to get what was advertised.
Quick and Easy
High quality replacement part thatís quick and easy to install.
Performance changing
Compared to both medium and large stock frames the WC is actually better for my very large hand. This frame allows for a faster solid grip on the gun, a better immediate grip out of the holster, and better grip for single hand shooting. This frame should be an option at the time of purchase so you can bypass the sig frame.
Easy as 1-2-3. Clear and take slide off of factory grip module, remove the take down lever, lift out trigger assembly and reverse the process. Check function. The Wilson Combat grip module fits my hand better than the factory one and looks better also. The pistol should have came from the factory with the Wilson Combat grip module.
Huge improvement from the SiG factory grip
If you're like me, you have odd shaped hands that are average length, but that are very wide (think needing a medium for length, but XL/XXL for width), then you will find this to be a huge improvement over the factory grip module. It has a thinner width, so doesn't feel as oddly chunky and certainly not as slick due to the wonderful stippling work. The grip angle and flat back strap make this feel very 1911-esque. The high trigger guard cut and long beaver tail make getting a good grip as natural as gripping the remote to change the channel from CNN. The only thing I would change, and this is very picky (which is why I'm still giving it 5 stars), is to add some length in the dimension of the front strap to the back strap. Not much, maybe a millimeter or two of material. That would make it absolutely perfect to me. Great job WC! I can't wait to give you more of my money.
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.
Great Upgrade
When purchasing my Sig M18, I was wanting a grip module that really fit well. I swapped out the the large size Sig grip module and found I had a better grip but it was not as comfortable in my hand. I found many reviews on the Wilson Combat grip module and figured Iíd give it a try. The 1911 style feel and aggressive texturing on the grip really gives me a good purchase on the grip and even with bigger hands fits comfortably. The ergonomics of the grip make releasing the magazine easy without having to move my hand and the flared mag well makes reloading very easy. I would highly recommend this grip module for those who feel the stock grip module is not giving them the feeling of a good grip on their hands.
How do you advertise tan but itís green
Feels good in my hand but the green is a total turn off I donít know what went through your guyís head thinking that is tan
Buy this
I had heard this module would improve the P320 firearm and decided to go for it. This module is an extraordinary improvement, in fact! Recoil management is improved, better stippling allowing for better grip, and it's a more narrow less bulky module than the one Sig provides. To me, the most important improvement is the firearm is easier to point - the angle is more conducive to the angle of my wrist allowing for faster sight-alignment. Best $65 bucks I've spent on a firearm. I hope they come out with a module for the P365 XL (my conceal carry). Thank you, Wilson Combat!
Color is OD Green, not Tan
Just got this in the mail and it is definitely not tan. It is closer to olive drab green, which is not the color I wanted. I'd rather have had black than green.
Love it
Easy and cheap upgrade to make my m18 go from blah ergos to very nice. Aggressive texture and it fits my hand so much better.
Almost perfect
I love this module. It changes the feel slightly of the M17. The stock grip wasnít horrible really but it is slightly large. With average size hands the stock grip was a bit big especially during extended shooting sessions. The Wilson Combat grip is a bit smaller and has a ton more bite on the grip. 2 things I wish were different. One, the slots for the weights should be made to be tight so people can simply slide them in without gluing them. This would actually be easy to fix by just making the weights a bit bigger. Two, the FDE is kinda ďblahĒ. I love the tan that Sig uses on the m17 and m18. Wish Wilson Combat did a similar color.
Dan B
This is a terrific piece. Fits my hand better then any handgun grip if ever had.
Love the grip but itís more green than tan
Got the grip on the mail today was highly disappointed with the color I actually went and seen if od green was a color they produced. I read when I bought it it would be a little darker but this is definitely way darker and I would say not tan
Sig wet the bed not making this the stock mod
Absolutely love the feel of this module! Completely changed how I feel about the M18, original just did not work for my hands. The one and only reason I didnít give 5 stars is the mag rattle which drives me insane and darn near makes me want to go back with original
Perfect fit
Was easy to install, the fit is perfect on the gun and in my hand. Adding the tungsten weights makes a difference. Sig Sauer makes a fine handgun, Wilson Combat makes it finer.
love it but had anyone noticed a rattle?
just got my 320-cmt. fits great and feels great. just noticed when i have a clip in it, it rattles though. not sure if it just isn't a tight enough fit or what it is. clip snaps well in place and releases great but for some reason it rattles also. anyone else had this issue? or do i have a issue with just mine. ps this is being used on my p320 m18 model
Grip Mod is a HOME RUN!
This grip module from Wilson Combat turned my Sig M18 from a 'ho-hum' pistol into a 'hey, hand me some more ammo!' pistol that you just don't want to put down! Wow!!! What a difference this grip module made in the handling, feel, and performance of my pistol. Definitely a must-have.
Outstanding Improvement
The fit and feel of the grip module is a tremendous improvement over the M-17. This is a must-have for anyone who wants to improve the handling of an M17. The changeover was easy. Thanks for the product!
Typical Wilson Combat
I have the carry grip for my M18, Iím incredibly pleased with the fit and finish of the module. It gives the gun a completely upgraded comfortable feel. Just another beautifully developed product from Wilson Combat.
Just amazing
I bought this for my M17. Wow. Just wow. What an absolute difference. Iím in love with this thing. The fit in my hand is excellent. The magwell is a thing of beauty. It looks amazing and the grip texture is excellent. I want more now. If only they werenít out of stock!!
WC320 Grip Module
Wilson Combat have done an incredible job with these grip modules. For my hand they are the most comfortable 320 grips so far. The stippling on the front and back straps is superb and gives you a firm grip that is lacking on the SIG grip. I really can't say enough good things about them.
Fits the hand so much better than the stock SIG frame/module. Installation was simple. Highly reccomended! You will not be disappointed.