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Sig Sauer® P320 Compatible Carry Pistol Build Kit

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The perfect way to upgrade or build a custom Carry-Sized P320.

Sig Sauer® has claimed their territory in the realm of the modular pistol with the P320: It's capable of swapping calibers, frames, slides, and accessories in just seconds.

We wanted to take it even further by offering you this custom carry-sized build (that's a full-sized grip with a compact-length barrel/muzzle): The Sig® P320 Compatible Carry Pistol Kit gives you with the parts you need to upgrade your existing Sig P320 fire control unit (or 80%-built MUP-1 chassis) with a 9mm-chambered barrel and Carry-sized P320 grip module (frame) with a textured, ergonomic grip and 17-round capacity.

What's Included?

In addition to the included frame/grip module, slide, and barrel, you're also getting a quality, US-built lower parts kit. This kit's precision-machined to OEM specifications with an upgraded trigger mechanism and is capable of chambering 9mm, .40 S&W, and .357 SIG as the P320 platform intended.

NOTE: This kit is not compatible with .45 ACP.

The P320 Carry-Sized LPK includes:

  • Lightweight Adverse 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: This kit does not include Sig P320 80% Frame (Chassis) or Magazine.

Need Help With P320 Parts?

This Sig® platform can get a little confusing, especially with all these calibers and configurations mix-n'-matching. If you're a new P320 owner or you're building or upgrading your first pistol, check out our P320 Build Guide. We cover compatibility and parts in detail.

WARNING: Handling firearms parts and accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information go to:

Shipping Restrictions

Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or "assault weapons" (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily. only ships within the United States. Federal legislation dictates we cannot ship our products internationally.


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.