The system is called David’s Sling (paid subscription required), and it makes no sense at all.

The system’s features:

• A “Stunner” interceptor missile, with two stages and a 3 pulse motor for the interceptor.
• David’s sling has it’s own radar.
• Stunner has two seekers, a radar and an infrared seeker for terminal homing (see funky nose profile below)
• Potential integration with Rafael’s Spyder air defense system.
• A maximum range from 180 to 300 km.
• A blast-fragmentation warhead.
• Detection to intercept of 38 seconds.

So, you’ve got a missile that weighs somewhere north of 500 pounds (bottom pic for scale), and will probably cost something well north of $¼ million a piece, and they will use it to intercept Kassams and Katyushas that cost something less than $100 and $1000 each respectively.

That’s sounds like a really good trade….not.