The FN MAG or whatever you want to call it has one drawback from what I've heard (we only had the M60) was that there was nothing up front to hold onto when the weapon was hot. Made it a little difficult to carry about in an attack.
Great weapon on a mount or stationary position, but try moving and fighting with it and you run into issues.
Now as for destroying things, the .50cal has nothing on a hundred kilos of ANFO....
