I'm sending my full sized P320 45 back to SIG for the voluntary trigger upgrade. While the gun is there I am going to have them install a flat trigger. What is the difference between the plain Jane factory flat trigger and the enhanced skeletonized flat trigger? Is it just cosmetic differences or actual changes in trigger geometry? Thanks in advance for your help.

I wouldn't waste time with the skeletonized trigger. The simple factory trigger works just fine.

The grayguns adjustable trigger is a step up.

Thank you.