There are a ton of images available online of users who have done this. If you go to Google images you can search "p320 full size slide on x carry grip" and you will get image results of this exact set up.
Nope it is not compatible with the .45
I bought a X Carry pistol. Love the frame. Since I already have several Compacts, took the slides and put them on the Xcarry Frame. No problems. I just ordered a X carry frame here to convert one of the compacts. Anyways the frame is pretty well built and really helps in shooting as it positions my hand. Keep in mind through you will have to use the Gen 2 Sig 17 round mags. They are starting to appear in stores now. However dealers may still have gen 1 in stock and send them your way. Anyways have fun and I appreciate SIGs awesome firearms.
The SIG SAUER P320 X-Carry Grip Module works with both 3.9" and 4.7" barrel/slides.
Yes, the SIG SAUER P320 X-Carry Grip Module will be compatible with your Full-Size P320. Your magazines will fit but extend past the base of your magwell, and your slide will extend past the end of the module (unless you have a 3,9") but still function as intended.
The SIG SAUER P320 X-Carry Grip Module does not come weighted but is weight compatible.
The Sig Sauer P320 grip modules differ in grip length and width between the small, medium, and large grips. A small grip is 2" long and 1.1875" wide. The medium is 2.125" long and 1.3125" wide. The large module is 2.25" long and 1.5625" wide.
The SIG SAUER P320 X-Carry Grip Module for 9 mm, .40 Auto, .357SIG GRIP-MODX-CA-943-M-BLK is compatible with the Sig Grip weights.
Yes. This is medium in size.
Yes it should work with it.