Can an new A2 buttstock finish be polished to look like an M16 buttstock? I like the black, shiny look, but I don't want to mess up my A2 stock if it's a no no. The Colt A2 stock has a grey-ish looking finish. Is that for gripping purpose? It doesn't match the hand guards either. I know I could search for an m16 buttstock. Just wondering. Thanks! 
