I asked this question a couple of years ago on here and didn't act on it so I thought I'd ask again. I have the plans and a few parts that I bought at a gun show as a kit. It shows how to convert a Ruger 10/22 into a select fire. Thought it would be neat but after looking at it it requires Machining. It's basically a guide and some Springs in part taped to the back of it. It's not something I'm going to try to do so I would like to sell it if it's illegal to do so or even too possessive what do you guys think?