The Spanish munitions company Instalaza made two models of rifle grenade during the 1960s.
The Type I could penetrate 250 mm (9.8 in) of armour, whereas the lighter Type II could penetrate 150 mm (5.9 in) of armour.
[1] 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 5.56×45mm NATO.
[2] This article related to weaponry is a stub.