I just obtained an AR15 made by Colt. The cleaning is pretty much straightfoward except I am confused about the best way to clean the gas tube. I have used a large pipe cleaner with some solvent on it, and without taking the gun apart, I don't know much else to do. I hope someone will tell me their methods and give me some ideas....... Thanks.
I've never worried about cleaning the gas tube nor did we while on active duty early seventies. Its stainless steel tubing only costs a few dollars if replacement is ever needed. Since it operates under such high pressure and has no nooks and crannies for carbon to build up doubt if there's ever a problem. Frankly I suspect someone came up with the notion about cleaning it either too sell the long pipe cleaners at outragous prices. Or they were someone obssessed with cleaning anything and everything.
From all the M-16s I have had the pleasure to shoot and clean run a quick pipe cleaner into the receiver end, through the holes surrounding the tube, and under it (over it) and call it a day. Most of the carbon builds up in the BCG.