if you guys and girls...sig, glock, kel-tech and kahr..did a 2 to 3 months of testing and firing a large amount of ammo...and re -inspecting the rail. prevent major damage and injuries. but, it is best you did a white shoes test. I learn this in the military, at my weapon school. used a liquid white shoe polish, apply light on the rail area. let it dry. then put you slide on your lower reciever. start pull the slide a few times. then, removed
your slide, and inspect the wear down of your weapon. this help you on spotting the even or uneven wear.
the shoes polish come easy with solvent and a tooth brush
ASK NOT WHAT YOUR COUNTRY CAN DO, ASK NOT WHAT YOU CAN DO FOR YOUR COUNTRY.