I am in Iraq right now and use an M-4. I dont have much experience with civilian models, but I can tell you that cleaning is a bit of a challenge. Its not too hard if you keep the rifle cleaned constantly. If it is clean when you take it out to use then it makes it much easier to clean once you are done shooting. Q-tips and pipe cleaners definantlyhelp out. I do have to admit that when I fist had the rifle I was thinking it would be a piece of crap, but it is really fun to shoot and is making me think about buying one when I get back home.