Hello all. So I have a wonderful wife who just put my name in the hat for a precision tactical carbine course. The course states that we'll be engaging targets from 0-500 yards. I was wondering what all your thoughts are for this course? I have 3 options on hand: 1-8 vortex lpvo, 5x vortex prism scope with a mrds piggy back, and a full size red dot with either a 3x or 6x magnifier. Oh! And the tool being used is a 16" armalite m15