"New" Fn Fal being tested by the Argentine Army

[Ermac]

That barrel is way too short. I imagine they shoot cartridges with reduced powder charges because shooting a full powered 7.62x51 in that would have a defening blast and recoil. I think a rifle shouldin't have a barrel shorter then 15 or 16 inches. As for the controlobility of such weapons in full auto comes down to the rate of fire. Most battle rifles and assault rifles have very high ROFs which makes them hard to control in full auto, it also chews up ammo faster and heats up the weapon faster by having a high ROF.