Not sure if this has been posted or not, but I discovered the P320 Legion X Carry adjustable suppressor height rear sight will work on P320 slides with the older rear sight design that requires you to remove the rear sight to install an optic. I was trying to build a “Legion-like” full size gun with a threaded barrel and suppressor sights. Since the Legion slide isn’t compatible with the factory threaded barrel, I used an older slide I had and thought I was out of luck for tall sights. Just wanted to share the good news in case anyone else wants suppressor height sights on their older P320 slide.

Some pics to show the finished product…