I have recently bought a third generation Colt Army. I attempted to fire it today when I noticed that it fails to fire about half, to 3/4 of the time.. I want to put some Treso nipples on it but don’t know what threads and what not a third generation will except. When I cleaned it earlier, I also noticed that it had nipple washers on each one… Looks like the original owner had the same problem and attempted to address it by making the nipples longer? Anyway I had heard Treso nipples were a might longer and would help with cap sucking. Any advice would be welcome. Thanks