SIG SAUER P250/P320 Grip Module Assembly, 9mm/.40/.357, Compact, Large

The SIG SAUER P320 grip module assembly is the core of what makes SIG's modular pistol platform so adaptable to different hands and shooting styles. This large-frame compact grip module works with 9mm, .40 S&W, and .357 SIG slide and barrel assemblies, letting you swap calibers and ergonomics without replacing the entire firearm. Drop in your P320 fire control unit, attach your chosen slide assembly, and you've got a fresh gun that fits your hand and mission.

SIG engineered the P320 platform around this modular grip concept, so upgrading your ergonomics or experimenting with different caliber platforms is straightforward—no gunsmith required. The large grip is built for shooters who prefer a full-handed purchase and control, especially useful in defensive or competition settings where a secure, high grip matters. This module comes in a durable black finish and is ready to go to work.

Whether you're fine-tuning a carry gun, setting up a range trainer in a different caliber, or building a dedicated competition setup, having the right grip module makes all the difference in how a P320 points and feels in your hand. If you already own a P320 FCU and slide assembly, or if you're planning to build out a modular system, this large compact grip module gives you another dimension of customization.

Key Features

• Modular design accepts P320 fire control units and slide assemblies
• Compatible with 9mm, .40 S&W, and .357 SIG calibers
• Large grip frame for shooters preferring a full-handed hold
• Compact slide length configuration
• Black finish

Specifications

Frequently Asked Questions

What do I need to use this grip module?

You'll need a P320 fire control unit (FCU) and a compatible slide and barrel assembly for your chosen caliber (9mm, .40 S&W, or .357 SIG). Once you have all three components, assembly is simple and requires no special tools.

What calibers does this grip module support?

This large compact grip module works with 9mm, .40 S&W, and .357 SIG calibers, provided you have the corresponding slide and barrel assembly for each.

How does the grip size compare to other P320 modules?

This is the large grip size, designed for shooters who want a more substantial grip circumference and a higher, fuller purchase on the gun. If this feels too large for your hand, SIG also offers small and medium grip modules.

Is this grip module easy to swap between slide assemblies?

Yes. The P320 platform is designed around modular swaps—simply remove your FCU from the current grip module, install it in this one, and attach your desired slide and barrel assembly. No gunsmith work needed.