Looking to upgrade the sight picture on my newly acquired Keltec Sub2000 9mm pistol caliber carbine. As is it's a pretty fair sight picture but I have a bit of trouble with black sight post on black or very dark backgrounds. I tried painting the post with some orange colored paint and it's not bad but it could be better. I was told that an AR15/M16 front sight post will interchange with the one on the Sub2000 as they are exactly the same. I have a Truglo tritium dot AR15 front sight if I can locate it. Does anyone know how you remove the Sub2000 sight post and replace it with another one?