You pays your money and takes your chances, every once in awhile, gremlins sneak into the works and create problems. Luckily, with modern manufacturing, this occurs a lot less than it used to. It is said that back in the 1800's Winchester produced a "perfect" 73 model about every 1000 rifles. I would imagine the opposite was true as well. Sometimes, you just get an inadvertent problem. HOPEFULLY, the problem shows up before the warranty is up. Thus the reason for the lemon law.