Mine has had zero issues. I bought it the beginning of spring and have had thousands pellets and slugs through it. It always runs and I don’t do anything but fill it and wipe it off when it gets dirty. I own an Evol too in .30 but the Leshiy is my take everywhere gun. I have a GK1 as well, which is awesome! But t the 450mm .22 Leshiy is just so handy. If I could change one thing, I would have gotten a 9mm Leshiy then I could go any caliber.