i stripped the screw that is right infront of the tip of the ion. say if you put the barrel in it would be directly under the barrel and above the regulator. I don't know how i did it but i guess i was screwing it in on an angle. trust me i felt like a complete idiot and wanted to punch a hole in the wall. but i just want to fix it or find an alternative. I've already settled with buying another gun but if i dont have to i don't want to.