You can only have one optic to compete in tac ops. So you would be competing in open. That being said go to a match, get an idea of of what 3gun/Multigun is all about, and some of the basic equipment you need. You will need shotgun shell carriers,mag pouch rifle and pistol and a secure holster. Then after you get hooked you can decide on what your going to need to be competitive some of us never get there but it’s still a blast! You can spend a lot of money or as little as you want. You just need the basics to start.