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P320 Jig

P320 Jig

Quickly and easily complete your 80% Sig with a P320 Jig.

Fabricating a Sig P320 fire control chassis? If you know what those words mean, then you already know why you're here: You need the gunsmithing tools required for cutting and drilling that P320 firearm so you can assemble a custom handgun that you built by hand. To make that easy as possible, you need the MUP-1 Jig, an 80% kit made specifically for the P320 platform.

How the P320 Jig Works

The P320 Jig is an incredibly simple but genius device. It seats the stamped steel receiver blank made for the P320. This 80% unit is then seamlessly cut and drilled, making it functional and ready for a P320 slide, grip module and parts kit, by simply following the provided instructions and using the appropriate drill bits and hand tools.

Want to know more? Here's the P320 Build Guide.

One Jig and Chassis, All P320 configurations

Completing a single 80% P320 chassis means you'll own the core firearm component required to own all P320 configurations. That's because the MUP-1 chassis is universally modular, just like Sig Sauer's factory chassis. Both units functions exactly the same once machined and assembled.

We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, Hawaii, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.