The Spanish munitions company Instalaza made two models of rifle grenade during the 1960s. As well as being used by the Spanish Army, the Portuguese Army also used them in the colonial wars that took place in its colonies in Africa.
The Type I could penetrate of armour, whereas the lighter Type II could penetrate of armour.
Each was propelled by being mounted atop a rifle's 22 mm grenade launching adapter, and being launched by a ballistite (blank) cartridge.
The Type II was enhanced further, with a bullet trap to accept 5.56ÃÂ45mm NATO.
A further development led to the Type V and is known as the FTV.