You wanted a foregrip, and a top rail for scopes.
M4 Mags
Short & Light

How about a Type 97B? Comes with a very nice integrated foregrip, a little pricey though, but i've heard amazing things about Real Swords Internals, and Externals, so you paying for quality.

G36 have magwell converters for M4s.

What's your height and build? Ex I am 5'5" and skinny

what do you feel more comfortable with?

AK-74 is super short but no battery in the stock, still slipping a tube battery under the dustcover is painless. No M4 mags without a converter though. Rail kits do exist to hang gear on them.

416 is very nice too, but a decent one will be very heavy.

Really the proper airsoft answer is to get them all!

spoken like a true airsofter :)

patriot m4, m733, stubby killer, pdw, LR300, TROY M7a1 if you can find it.
the hell you just need to type 'shorty' in ehobbyasia wtfbbq

or you can be a real man and get a military steyr aug shorty with absolutely no rail on it.

Fighting kitty

There yah go. Someone at our field has that and its a wicked gun!

Danke if i could afford it i would

Najohn i'm 5'7" about 170 lbs

Scurvythepirate i've seen the 97B and i don't find it very visually appealing

AK47 Beta Spetz might work, has a full stock but shorter front end.

AKS74U is also nice, get a 2200mah 9.6v stick batt from G&P and it'll last you all day