Peter, the mag in picture has been done for the current use as per Canadianicon mag capacity laws. It's the way we found that would not be questioned by law enforcment. Otherwise, you would have to weld the follower so it can't move. The mags you talk about I may have seen, and they had been shortened to half the size of the standard mag. I was told they had been made for grenade launching purposes. But the people who told me that wouldn't know for sure. I didn't see many of them in any case.