So, let me ask it this way; If what I have is a .45 1911, a semi-auto shotgun with no optics and an AR15 .223 with a 1-4X scope, what division/class would I have to shoot?
Tac Optics along with a whole bunch of people. Most shooting 9mm handguns. Here is the link to the rules. Page 3 are the different division. http://www.indianamultigun.com/Media/INMG Rules rev 3-29-12.pdf
I believe Tac-0ptics based on the AR in .223. It would not qualify for "Heavy Metal." The 1911 would perhaps put you at a disadvantage in that group due to the relatively low mag capacity but still very fun.
Put me in touch with your match directors and ill help them get it rolling.