I am curious because I have a lot of 30 rd mags for my tec, but nothing for my SOON TO GET on my b'day ruger 10/22. Does anyone know if these are the same mags, or what? thanks for the help, I have learned a lot here before deciding what gun to buy and what to do with it. This site is addictive....Also, the tec is at my parents house so I don't know the name of the manufacturer. sorry. any help is appreciated