If they can use a 30 lb missle to accomplish the same thing as a 60 lb TOW Here:
8) Vertical assault trajectory.
Spike goes smack down on top of the tank, where the armor is thin. Somewhat like that thing from Bofors. Of course, one may try to ticken the top. There's ways around that too :).
New U.S. Javelin AT missile is a "top attack" missile as well. It's shoulder fired and lightweight just like the Gil. The Israelis make great stuff and I'd fight terrorists along side them any day. God bless the USA and Israel!