HEDP Hi-Low grenades have an impact fuse. Their generic damage profile is 3d20 EXP-DMG | 6 PEN | S. EXP.
High Explosive Dual-Purpose grenades are a fearsome addition to the rifleman's arsenal. They are capable of inflicting casualties on nearby infantry, but their most deadly ability is that of piercing through lighter armoured vehicles like butter. In the mid-1960s they remain confined to laboratories and select groups of special forces soldiers, as the technology has not matured yet.