Heres a link for SA-12 Gladiator/Giant
http://warfare.ru/?catid=264&linkid=1696
Note it is in the same class as MIM 104 Patriot [Reams have been written on its (in)accuracy and (in)effectivenss!].
Surely the only need for a blast radius is against a formation of aircraft, which WinSPMBT doesnt allow, or a flock of helos (probably below the minimum targeting altitude).
Very few "missiles" rely on an impact fuze, though they usually have one for a lucky hit. The prox fuze is what gives them some chance.
The laser guided Starstreak HVM has 3 APHE sub-munition darts capable of penetrating armour and as such is one of the few "hitiles" actually designed as such. It has been tested in a secondary air-to-ground role as the darts can theoretically penetrate over 1000mm of RHA at 6km.
The current AAA and SAM seems lethal enough to me, but I'm an ex-pilot so I'm probably twitchy about flak!
Weeble