I bought the six inch barreled Neos a couple of weeks ago. I enjoy shooting pistols at targets and plinking, but I am not very good with a pistol. This pistol will not only run on any .22lr ammo (I shot 5 different kinds - CCI standard, Winchester Wildcat, CCI Mini mags, winchester bulk, and winchester super X) but it made me look like an expert at the range. Everything functioned and shot flawlessly. I am VERY impressed with the performance of this pistol. I had to try to make the groups larger than 3 inches. I can't wait for the 4 inch barrels to come in so I can get that so my wife and son will be able to shoot easier; the six inch barrel is a little top heavy, but Man is this pistol accurate!