Oddly enough...no one is talking about tactics? Why is that?

If you want real practice (using tactics), play paintball. It's not a poor man's sport but it's a lot less painful when you get hit. Make no mistake-- wear thick clothing and goggles. I would be lying if I said that at close quarters the paint pellets don't hurt. MUCH better than a lead slug though :)

Ideally, you want to play on a more adult play field. Places that allow children to play generally disallow firing "blind". Firing blind may be expensive or....crazy? if you're low on ammo....but....

Imagine rushing in the open through enemy fire like some dumbass 2nd Lt. and throwing yourself behind a crate not quite big enough to completely hide you....and you're ruled ALIVE! Now imagine not being able to simply hold your weapon (only) over the crate and being able to spray the enemy with fire from a much better position-- because some lawyer thinks a kid is too stupid to understand why he should keep his head down when he's getting shot at.