I have a FNP-45 Tactical and I'm trying to figure out which red-dot to put on it. FN shows the pistol with the red-dot installed on their site but I'm having trouble understanding some of the terminology. I've been looking at the Optics Planet site, here's what they have. They had another one that said it was a 7 MOA model, but it's not there anymore. What am I looking at here? I kind-of understand the MOA thing but could use some clarification. Thanks in advance!