Yeah it is a pretty nifty gun. The tube feed is in the butt stock, and it holds around 15 rounds. The bolt pops out via this button at the stock-end of the barrel. I have yet to see a gun like it (I have seen few guns in my life so that might be why though ahah). Yall are actually the first people to seem to konw what model I am talking about, as I have posted here about this gun many times before with no hands-on info coming from anyone. It is a pain to take apart beyond that, however, because it has so many pins and lots of parts that require great dexterity and a lot of patience.
So what is the difference between a .22 L, LR, M and S? Is it just hte length of the cartdrige or bullet?