You sure? That handguard kind of looks like a G3 to me.
It cannot be a G3. G3 is a blowback and that clearly is a gas tube and a gas block Its not a Galil either, the sling swivel is in the wrong place. It has a weird bit of plastic conecting the barrel and gas tube at the end of the foregrip wich is missing on the Galil but is present on the K2.