I have this colt that was passed down to me and don't understand what it is. The slide says series 80 officers acp. Ok I get that much. I searched som pics and everything I found looks totally different. To me it seems that the frame uses standard grips. My hand has plenty of room and I have big hands. Is this normal or am I just an idiot? thero of the grip is stippled and it has colt custom grips as well as the frame being aluminum please help.