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  • Sig Sauer® P320 Compatible Carry Pistol Build Kit Sig Sauer® P320 Compatible Carry Pistol Build Kit 2 Sig Sauer® P320 Compatible Carry Pistol Build Kit 3 Sig Sauer® P320 Compatible Carry Pistol Build Kit 4 Sig Sauer® P320 Compatible Carry Pistol Build Kit 5

    Sig Sauer® P320 Compatible Carry Pistol Build Kit

    The perfect way to upgrade or build a custom Carry-Sized P320. Sig Sauer® perfected the modular firearm with the P320 handgun: It's capable of swapping calibers, frames, slides, and accessories in a matter of moments. We wanted to take it a step...

    $699.99
  • Sig Sauer® P320 Compatible Compact Pistol Build Kit Sig Sauer® P320 Compatible Compact Pistol Build Kit 2 Sig Sauer® P320 Compatible Compact Pistol Build Kit 3 Sig Sauer® P320 Compatible Compact Pistol Build Kit 4 Sig Sauer® P320 Compatible Compact Pistol Build Kit 5

    Sig Sauer® P320 Compatible Compact Pistol Build Kit

    The perfect way to upgrade or build a custom Carry-Sized P320. Sig Sauer® has the modular pistol situation locked down with the P320 handgun: It's capable of swapping calibers, frames, slides, and accessories in a matter of moments. We wanted to make...

    $699.99
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 Finish your Sig P320 handgun with a modular, easy-to-swap parts kit.

The beauty of the Sig Sauer P320 is its modular design: Using a universal chassis that holds the fire control parts, the P320 can be easily converted between four sizes - Full, Carry, Compact, and Subcompact - and different calibers! The chassis allows for a quick and tool-less swap of the grip module (frame), barrel, slide, magazine, grips, and accessories. Thanks to our partnerships, we're now offering various P320 build kits!

P320 Build Kit: What's Included?

Regardless of size or caliber, all P320 parts kits include:

  • Trigger
  • Trigger Bar Spring
  • Trigger Bar Stop Pin
  • Trigger Bar
  • Sear
  • Sear Pin
  • Sear Housing
  • Sear Spring x2
  • Sear Housing Pin
  • Safety Lever Pivot Pin
  • Takedown Safety Lever
  • Takedown Safety Lever Spring
  • Takedown Lever with O-Ring
  • Mechanical Disconnector
  • Slide Catch Lever Pin

PLEASE NOTE: No kits on this page include the P320 80% chassis. No kits include a magazine. These must be purchased separately. The P320 80% chassis must be fabricated by the end user.

Check out the P320 80% Build Guide for FAQs, details, and how-to steps!


DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At 80-lower.com, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.

DISCLAIMER: “Sig Sauer” is a federally registered trademark of Sig Sauer, Inc. and is one of many trademarks owned by Sig Sauer, Inc. Neither 80% Lowers, a/k/a Tactical Gear Heads, LLC nor this site are affiliated in any manner with, or otherwise endorsed by, Sig Sauer, Inc. The use of “Sig Sauer” on this page is merely to advertise the sale of Sig Sauer pistols, parts, or components. For additional genuine Sig Sauer, Inc. products and parts visit www.sigsauer.com.

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.