Description
Wilson Combat engineered this full-size grip module from the ground up to improve what the stock P320 frame gets right. The polymer construction keeps things lightweight while the aggressive Starburst grip pattern on the sides and texture across the front and backstrap lock the gun in your hand without cutting into skin. The shape itself is notably slimmer than the factory module, reducing overall circumference and trigger reach for a more natural point-of-aim and quicker access to the trigger.
Performance-focused grip design
This frame incorporates suggestions from tactical trainers and competition shooters into a module that changes how your P320 points and feels without modifying the fire control unit. The high-cut 1911-style beavertail protects your hand during dynamic shooting, while the undercut trigger guard and radiused edges let you ride the gun high for maximum control. The enlarged, integrated magwell opening plays nicely with modern SIG factory basepads and speeds up reloads when they matter. Internal slots accommodate rod-style tungsten weights if you want to add mass for reduced recoil.
Drop-in upgrade for any P320 FCU
Because the P320's serialized fire control unit stays put, you just swap the grip module without any gunsmith work or paperwork. Full-size modules accept standard and high-capacity P320 magazines. The frame reference serrations give your support hand thumb or index finger positioning feedback during draws. Angled holster cuts prevent snagging on the light rail during re-holstering. This module works on the range, for duty applications, or personal carry setups.
Key Specifications
- Manufacturer: Wilson Combat
- Manufacturer Part Number: 320FSB
- UPC: 810025502676
- Fit: Sig Sauer P320 Full-Size
- Material: Molded Polymer
- Finish: Black
- Manual Safety: No Manual Safety Notch
- Caliber Availability: 9mm, .40 S&W, .357 SIG
- Frame Length: 9.4 inches
- Weight: 0.35 ounces (module only)
- Magazine Compatibility: 15-round and higher capacity P320 magazines
- Features: Starburst grip pattern, undercut trigger guard, integrated magwell, tungsten weight slots, extended beavertail, holster cuts on light rail
What’s Included
- Wilson Combat WCP320 full-size grip module
- Polymer magazine release button
Frequently Asked Questions
Do I need a gunsmith to install this grip module on my P320?
No. The P320's fire control unit (FCU) is the serialized part, so you simply drop it into this module without any tools or professional help. The magazine release button is installed by hand and takes just a few minutes.
Will this WCP320 full-size grip work with my existing P320 magazines?
Yes. The module accepts standard and high-capacity P320 magazines rated 15 rounds and higher. It's also compatible with the latest generation SIG X-series factory basepads, so modern gear fits without modification.
Is the grip texture too aggressive or uncomfortable to carry?
The Starburst pattern and stippling are textured for control but not abrasive. Users report the texture provides excellent grip security without snagging clothing during carry or re-holstering. The feel is comfortable in the hand even during extended shooting sessions.
Can I add tungsten weights to reduce recoil on this module?
Yes. The WCP320 grip has internal slots designed for rod-style tungsten weights, which you can add as a separate purchase. This lowers the pistol's center of gravity for better recoil management in dynamic shooting situations.





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