I just got one, took it completely down cleaned and lightly oiled it. There is a ton of info on Brian Enos site, but everything I've read said that if you keep the piston and rings clean you should be good to go. When taking it down take the rings off and clean them very well. I put 100 rounds of federal bird shot thru it from walmart, and about 30 remington full peeress slugs mixed in the mag tube, no issues think I had one fail to eject with bird shot. Seems pretty reliable, and it shoots pretty soft. I am confident that it will be a good shooter for a club level 3 gunner, another note is the slugs shot high like 5 inches at 25 yds.