I bought a replacement pistol grip for my Bushmaster and went to change it out. Instead of a alan screw or philips there is something that I have no Idea what is. Its not a star or hex head or anything I have seen before and I am not a complete idiot when it comes to tools. Anyone experience this? Couldnt find anything on youtube specific to BM. Disclaimer Apparantly I am an idiot. Alan screw, just odd size and looked different until I got a flashlight.