Nice durable sight, but the mounting rings are left to be desired.... - Aimpoint 9000SC Red Dot Reflex Sight

I mounted this sight on a 1911 bullseye gun with the sight mounted on the slide. After only about 100 rounds of soft target velocity 45 rounds the scope rings didn't just came loose, losing the zero, the mounting screws also "ate" into the slots on the rail. I'm using the Clark 1911 rails which has a picatinny width slot and maybe that's the culprit I assume. Anyway, if you plan on mounting this thing on a bullseye gun I suggest you ditch the OEM rings and get yourself a better made and suited ones that will properly go onto a bullseye gun. Other thn that the scope itself is great!