If I had to choose a gun I've used in video games I'd go with the M4, then the M16. I don't know specifics on either but I like their mix of accuracy and power.
--------------------------------------------------------------------------- I don't want a big car, particularly. I have no need for acreage, and I don't like the fuel bills. But I don't want a small one because they're all like supermarket own-brand cola: weedy imitations of the real thing - Jeremy Clarkson
But of the three the M-4 is the most fun and impressive to shoot
I don't agree with the idea that an M4 is impressive to shoot. It has the feel of an air rifle.
It may seem light like an air rifle but when on patrol day in and day out you want something light that can still lay down an impressive amount of fire power
--------------------------------------------------------------------------- “Walk Softly and Carry a Big Gun” Dawn of War Soul Storm
--------------------------------------------------------------------------- ~King of Dark~ ♮C.0.W♮ My Past has determined your future My torrential pain will be your unspeakable suffering Your days are numbered Don't fear the end Pray for it and unlike your own immortality My thirst for vengeance WILL NEVER DIE