Ok, well you can go as far as you want authenticity wise, clothing boots, and hell if you want to be a commie bastard you can, but none of us are...
We use blanks, no lead wood or nothing just the brass and blackpowder, and yes occasionaly someone will get a chip of brass in his arm or something, thats why we don't aim at eachother at all..
Alot of the guys are EMT's RN's and there is a doc too, he's got lots of pain meds..
No live ammo, only at the range..