As of 2005, there were two additional models in the development or testing stage, both relying on smaller, and therefore lighter, warheads.
Due to these effects several small warheads cause much more target damage area than a single large one.
It has also been reported that Israel has produced nuclear warheads small enough to fit into a suitcase.
At the time (the late 1940s), no missile conceived could carry even the smallest nuclear warheads then thought possible.
If they did, it would be almost impossible to knock down the small warheads.
"He didn't want me to hit him with this small nuclear warhead before his time," Bowe was quoted as saying.
There is also another model called Zelzal-3B with smaller warhead and a range of 250 km.
It could also carry a jammer payload, or a small warhead.
This technology allows for a smaller warhead to destroy the target missile.
Recommended for weapons that must fit on small warheads.