I think there are plenty of arguments for not limiting mag cap. But i don't think that whats in the video is a good one. Not having time to change the mag for example but in the video there was plenty of time. Strange thing is even with the strict firearms laws in the UK mag restrictions is not one. Probably because it won't make any difference as a mag can be changed in a few seconds so whats the point. Someone with two 10 round magazines can do just as much damage as someone with one twenty round mag. Not changing the mag was the problem not the capacity. I have had plenty of discussion on this forum about the amount of ammo to carry my view was that carry at least one extra mag. Most replied that they carry a revolver or that most self defence situations only three rounds or so are fired so 6 rds or one mag is plenty. So the ones that said that 3 are plenty can hardly now say that the video is a good argument against mag restrictions.