Went to my local gun store and purchased a Safariland 578 GLS Pro-Fit holster for my Sig X-5 Legion. Salesman said it would fit my Legion and on the side of the box it stated Sig P320 however it didn't note Legion. It did state one had to use the enclosed shim. I tried to insert the pistol without the shim wouldn't fit that's fine. I installed the shim still wouldn't click in place. Checking to see if anyone has tried this holster for the X-5? It looks like it should fit however just won't go in. Thoughts appreciated.

Thanks!