I've been a huge fan of .22 rimfire guns since I was a kid. Over the years, at least since 1964 when they first appeared, I've been working with and on Ruger 10/22 rifles. Why Ruger decided to make those dang stocks so short that only kids and short stature women can shoot 'em. These days, there are so many aftermarket barrels, stocks and pretty much every internal component available that it'll make your head spin. For those who like to "tinker" with these rifles, it makes things that much more fun. One of the components involved with the Ruger 10/22 that I like to tune up and make a bit better is the bolt. Bringing headspace into a better condition that eliminates "light rim hits" from the factory 0.0550 inch dimension down to 0.0430-0.0420 dimension, gives the bolt a little bit more closeness to the breach face for more positive ignition. Pinning the firing pin to keep it down and going straight forward will keep the front end from rearing up and presenting flyers on target. A better extractor for much more positive extraction will have spent brass flying out of the chamber and landing 12 to 15 feet to the right. Fun stuff to make a GOOD rifle, even BETTER.