Diamondback, I think Zant is talking about the Type 99 light machinegun, not the Type 99 rifle, and he is sure right about those magazines; they are made from unobtanium.
Maybe it is silly to point this out and I will get slapped down, but the Ruger magazines have to be inserted like the M14 magazines - tip forward at the bottom, put the front into the mag well until the front hole engages, then swing the bottom back and up. If you try to just push them straight in like the AR rifles, they jam and won't feed.
OK, I am wearing a steel pot (no cheap kevlar for this old soldier), so let fly.
Jim