I'm very unfamiliar with APs, this is my very first one, ZF 14500 .. I was just about to GL this one except I noticed what looks like another "AP" on the back! Just waiting for my TD to confirm what exactly is this and if my eyes aren't playing tricks on me (or is this actually part of the design?), but if it is an extra piece should I RL or can I easily take the back off and remove it?