Grip Module, WC320, Carry, Standard Safety, Black

Grip Module, WC320, Carry, Standard Safety, Black
Item Number: 320-CSB
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 Number of Reviews: 7
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Detailed Description


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


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.
  • 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.


Click Here for Decoding Wilson Combat P320 Grip Module Part Numbers

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.


 Product ReviewsClick here to review this item
Thanks 3/26/2020
This grip module changed my X carry from a lovable lump into a concealable EDC that fits my hand. A buddy of mine tried it at the range and decided to order one. Thanks,
- Terry Wacasey, MO
X Carry Dream module 3/24/2020
When I saw WC released their module, I bought the module before buying the gun. Finally today, after finally finding an X Carry, first thing I did was clean then install the WC grip module. World of difference! Love it, and it looks better too!
- Adam, VA
Best Grip Module for Sig P320 2/24/2020
I own a P320 RX Full, RX Compact, and Sub-Compact and use the Small Sig grips. They all have an annoying bump on the front strap and the palm swell is too big. I tried the X-Compact and XCarry grips but they are too fat and don't have the cut-out for the trigger finger making trigger reach more difficult. This grip is shaped perfectly and feels like you are holding a single stack pistol. I'll be purchasing more of these as soon as they are back in stock and can't wait until they come out with the Compact version.
- Robert Germano, CA
Love the grip, but fit slightly odd 2/20/2020
Just got this grip module and I love it - with one minor exception: It went on fine and the grip feels really good in the hand. The only issue I have is with the fit along the slide: as it gets past the take-down lever, it starts to warp down away from the slide and kind-of wedges out - providing a larger gap at the muzzle of the gun. I would have hoped it would fit evenly along the full length of the slide. I have considered trying to order another one to see if might be better; I know it is molded plastic, but would love to get better fit without doubling my money into this thing.
- Michael Miles, IN
Excellent upgrade 2/13/2020
WC knocked it outta the park with this grip module. I thought Sig did a great job on the ergonomics of the P320, but this takes it to the next degree. Get one you won’t regret it. Hope WC does a compact that takes 15 rounders.
The best grip option available 2/12/2020
I’ll keep it short and sweet because the other reviews nailed it on the head... Im absolutely in love with the grip module I’ll be building another P320 just so I can buy another. perfect texture where you need it amazing undercuts, definitely give you a much higher grip smooth finish no mold seems like my m17 and incredible flared magwell again just amazing
- bradley nelson, NM
Phenomenal upgrade 2/8/2020
When Wilson Combat released their own grip module, I noticed from their press release and images that they appeared to have fixed every small issue I had with the X-Series and standard P320 grips. Mine arrived yesterday, and I can confirm: 1. The WC grip module has a groove cut for easier magazine release actuation. It's as good if not better than any gunsmith attempt I've seen, and it's on both sides. Without needing an extended magazine button, people with normal size fingers can drop the mag without shifting the grip. 2. The WC grip module has a beveled mag well and is shockingly deep and wide. Compared to the removable, metal X5 mag funnel, it's not as wide, but I am actually no slower on the timer doing reloads with the WC grip module. For context, it's somehow bigger than a Magpul aftermarket mag well for Glock pistols, yet it doesn't seem to add any length to the grip and the width looks just right. 3. The sandpaper-like texture on the front and back straps is about as aggressive as a Glock RTF2. Maybe more. It is not uncomfortable after firing, unlike the CZ P10 pyramid-style texturing that rubs my hand raw. This is probably the best I've found. 4. The very annoying added grip width at the back-top of the X-Series (X-5, X-Full, X-Carry, etc) grip module has been eliminated. This is a small but very helpful improvement. No more rubbing my firing hand thumb raw! Plus, the beavertail is much closer to that of the original P320 frame, but a little bit longer out back and with a little bit more relief up top for a shorter box axis. This is 10x more comfortable than the X-Series grip module that has a beavertail that is uncomfortably long (pokes into my ribs) when carried in the appendix position. Again, a perfect compromise. 5. The sunburst designs on the left and right side are beautifully done. The texturing is very much like the Archon Type B in that it provides a bit of extra traction but won't tear up shirts or snag on anything. There is no flashing or other imperfections in the molding. I think it's gorgeous. I showed my friend, a Wilson Combat enthusiast who didn't know this new grip module existed, and at first glance he first thought my X-Carry was a build from the WC custom shop or some entirely new pistol. 6. It's quite strange and exciting to see the Wilson Combat name on my carry pistol. Wilson Combat has provided a way for P320 owners to upgrade their pistol grip functionality and aesthetics beyond that of any striker fired pistol that I've encountered. Think of this grip module as having Glock RTF2 front and back strap texturing, Archon Type B side grip texturing, a race-gun inspired beveled mag well, a custom gunsmithed magazine release groove on both sides, and the looks that have helped make Wilson Combat famous, all for less than $100. It's greater than the sum of its parts, too, and that's saying something. I highly recommend it in black. -Neal
- Neal, MI