Sig Sauer® Compatible P320™ Lower Parts Kit – 9mm/.40/.357

The Sig Sauer® Compatible P320™ Lower Parts Kit - 9mm/.40/.357 comes complete with essential parts as described: If you're doing a Sig Sauer® P320™ compatible build, you'll need a lower parts kit to get your MUP-1 up and running. That's the part legally considered the firearm and also the part you keep when you're changing out frames, slides, etc., to convert your sidearm into different P320™ pistols. Well, this is your lower parts kit. It comes with all the parts you need to make your 9mm, .40, or .357 chambered MUP-1 fully functional. See below for more info. Please note: This LPK will not work on builds chambered in an actual Sig Sauer® P320™ chambered in .45acp or a P320™ compatible 80% build chambered in .45acp. What's Included: Trigger stop pin Slide catch lever pin Safety lever pin Sear pivot pin Split coil pin Slide catch lever spring post Take down safety lever Safety lever Slide catch Sear O-ring Take down lever Slide catch assembly Spring, slide catch lever Spring, sear (2) Trigger bar spring Spring, takedown lever Flat Faced Trigger Trigger bar Sear housing Manual disconnector  

No. This product is a part or accessory and does not require an FFL for purchase or shipping.

While Sig Sauer® Compatible P320™ Lower Parts Kit - 9mm/.40/.357 is legal in most states, always verify your local laws before placing an order. We comply with all state regulations.

In most cases, yes — Glock-compatible frames are designed to accept Glock OEM and compatible magazines. Always confirm fitment in the product details.

That depends on your state’s concealed carry laws. Once properly serialized and registered, carrying may be allowed under state law.

We ship all over the USA within 1–3 business days. You will receive tracking once shipped. Delivery times vary by carrier and region.