Here is a website(just stumbled across it) that has info on making mods on Ruger 10/22's. So far they have covered stocks, barrels & trigger assemblies. The newest covers bolt handles. Scroll through the topics and pick out all those with the title: Soup It Up For Soldiers. It doesn't cover everything but at least there are some pictures and ideas. Looks like there is a lot more info if you look for it.
http://mygunculture.com/?s=SOLDIERS
http://mygunculture.com/?s=SOLDIERS