Don't be misled,there is NO SUCH THING as "mildly corrosive ammunition".It either is or it isn't,advertisers either unknowingly or intentionally try to use that to sell it making it sound less harmfull.You must clean everything that the combustion gases come in contact with EVERYTIME you shoot.The primers contain corrosive salts that if left too long(sometime overnight) you might come back to a browish/red nightmare.The salts aren't necessarily bad in themselves,but work together with atmospheric humidity to do their nasty work.
Personally,unless you have a gun cleaning fetish,I would stay away from it,especially for gas operated systems,as they are much more difficult to clean completely of all residue from firing.You can clean up with a mild solution of warm water and soap,but I'm not a fan of pouring that into my gas system either.Ammonia based cleaners(Windex)are not necessary to remove the corrosive salts as some believe,and in fact if left to long,in high enough concentrations ammonia can be harmfull itself,although the amount in window cleaner would most likely not be enough to do so.I just wanted to make the point that you have to be carefull with ammonia as well.