Sig Sauer P320 Full-Size Grip Module - Black, Small, 9mm/.40 S&W/.357 Sig

The Sig Sauer P320 Full-Size Grip Module in black is the foundation of the modular P320 platform—the grip frame that lets you customize your duty gun, competition pistol, or carry setup to fit your hand and mission. If you're already running a P320 and want to swap to a small frame or try a different caliber without buying a whole new pistol, this genuine Sig polymer grip module is what makes that possible. It's built with the same tough, textured polymer as the factory unit and goes on quickly with no gunsmith required.

The modular design is the P320's defining feature. Your firing control unit—the serialized part that the ATF considers the "gun"—stays the same; you just swap the grip frame to change caliber or ergonomics. This small grip module fits 9mm, .40 S&W, and .357 Sig slides and barrels, so you can adapt your P320 to different cartridges or hand sizes without starting over. The texture provides confident purchase under stress, whether you're at the range, in competition, or carrying for duty.

If you already own a P320 and want a spare grip frame, a second caliber platform, or a fitted module that matches your hand better, this is a straightforward upgrade. Confirm that you have a P320 firing control unit and the appropriate slide and barrel for your chosen caliber before ordering—the grip frame itself is inert and requires those parts to function.

Key Features

• Genuine Sig Sauer modular grip frame for P320 pistols
• Textured polymer construction for secure handling in wet or high-stress conditions
• Compatible with 9mm, .40 S&W, and .357 Sig P320 slides and barrels
• Straightforward installation—no gunsmithing required
• Small size fits shooters who prefer a tighter grip circumference

Specifications

Frequently Asked Questions

What do I need to use this P320 grip module?

You need a P320 firing control unit (FCU) and a slide and barrel chambered in 9mm, .40 S&W, or .357 Sig. The grip module itself is the frame; it does not include the firing control unit or barrel assembly.

Can I swap this grip module between different calibers?

Yes. The modular design lets you use the same firing control unit across calibers by swapping the grip module, slide, and barrel. This small module works with 9mm, .40 S&W, and .357 Sig configurations.

Is this grip module easy to install?

Yes. Installation does not require a gunsmith. The firing control unit seats into the grip module with basic hand assembly.

What size is this grip module, and who is it for?

This is a small grip module, designed for shooters who prefer a tighter grip circumference or have smaller hands. Sig Sauer offers different sizes; confirm the small size matches your needs before ordering.