Have a friend who might play, but theres an issue

[Sacarathe]

A hi-cap that can fire all its' shots once wound would make for the least amount of reloads; discounting a box mag which would add a fair bit of weight. Not sure if you can can flash-mags for the MP5 but from what I've read those can fire all their contents once wound.

There's the MP5 electric 500rd Mp5 Hi-cap I linked above, a 1000 rounds in a day is more than enough for anyone. I recently got the CYMA MP5K - it weighs more than my all plastic M4, there's a lot of metal on it. There are lots of plastic MP5s out there, but CYMA mp5k is not one of them, that said, going on the comments above, I suspect the regular tapered front mp5 to be most desirable with the telescoping stock.