Originally Posted by Eeyore
Its simple Mp5 has many more accessories and parts to make it your own. Mags feed better. You can fit them in M4 pouches, P90 try and find pouches. Try to quickly change a P90 mag in a firefight...good luck.
About the only thing P90 has going for it is that a retard could disassemble it.
Honestly the P-90 speed reload thing isn't that bad. I found that when I used to drill it, though, that if you even slightly misalign the magazine off from where it feeds, and you try to slap it in, it'll really scratch up the feed lips before locking properly. Over the years, I'm sure you might actually wear the lips down.