No personal experience with them, however I will relay some recent information from a friend who has several (warthogs, and previously other models). He is having some type of feed problem, unsure of what exactly. He seems to have tried all the normal fixes and nothing is working. Of course, Para said send it back ( at his expense) and that it would take a long while. This gun is brand new, I know, as I delivered it to him.
Another associated point.... A local gun store, who really does a high volume at the national level, has stopped carrying Para because he was having too many brought back from unsatisfied customers and the return costs was too high. This really spoke to me.
Like I mentioned, all this is hear-say. I've also heard of many who have NEVER had a problem.
Good Luck with this,
Deerandduck