I have one and will buy another if I can get it at a reasonable price. Very accurate and FUN to shoot!! Easy to tell if its the new one. The barrels were fluted on the early ones.the new ones are smooth barrels. No probe if its an older one, keltec will update it if you send it in.
So far after around 350 rounds it has been 100% free of any issues.
I take that back, you have to be careful loading the Magazines. If you goof up they wont feed right.only happened on first mag.easy once you figure it out.BUY IT!!!