I have recently had a Colt AR-15 A2 come into my posession. I know how to fire the blasted thing, but I really don't know much about the care and cleaning of same. The Navy had me firing everything but this type of rifle, so I am a little out of my element. I hear they can be a bit cantankerous if not cleared after use, so I am wondering where I can find a good guide to doing basic cleaning and maintenance. I know everyone else is an expert and can probably do all this blindfolded and in a gunny sack, but not me.