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 such a sidearm into a custom build kit available to you in the compact size: The Sig® P320 Compatible Compact Pistol Kit provides you with all the parts required to upgrade your existing Sig P320 fire control unit (or 80%-built MUP-1 chassis) with a 9mm-chambered barrel and compact-sized P320 grip module (frame) with a textured, ergonomic grip and 17-round capacity.
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 Compact LPK includes:
- Lightweight Adverse Trigger
- Trigger Bar Spring
- Trigger Bar Stop Pin
- Trigger Bar
- 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 any mgazine.
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.
We cannot ship certain parts and accessories to states that prohibit the sale or ownership of such components, like California, New York, and others. Before ordering, see our shipping restrictions for a list of all prohibited states and locales. We try our best to keep our shipping restrictions current, but state laws change almost daily. It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm.
80-Lower.com only ships within the United States. Federal law prevents international shipments of our products.
WARNING: Handling firearms parts and certain firearm 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, visit www.P65Warnings.ca.gov
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: www.P65Warnings.ca.gov
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.
80-Lower.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.