Are there any differences between conventional weapons and non conventional weapons?
Conventional means accepted standards.
Conventional weapons are normal weapons that most nations
possess; warships, airplanes, artillery, tanks, Machineguns,
etc.
Un-Conventional Weapons are weapons that most nations do NOT
possess. Nuclear Weapons would be un-conventional weapons. An
un-heard of primitive weapon might be considered an un-conventional
weapon.
The term can also be applied to warfare itself: Un-Conventional
Warfare might be guerrilla warfare; Conventional warfare would be
traditional Armies fighting against another Army.