riot control explosives

This is for riot control in relatively open areas like parks and large roads. The bomb consists of a heavy base with booby traps so it goes off if you try to push it, carry it or otherwise tamper with it. It should be heavy and solidly build so it would be impossible to carry off or damage it with anything less than high powered armor piercing ammo. Explosive should be not too much, maybe several kg of high explosive. Casing would be thin metal or plastic to limit framents which will increase the lethal radius too much. Since you would need to protect the timing device and detonator maybe you could armor that and position it in such a way that fragments would be directed upwards or downwards. If you want to be fancy use a DIME (Dense Inert Metal Explosive) for the explosive to limit the lethal radius. Just google how DIME works. Once you set the timer, it would be optional to include a mechanism for safe de-arming of the bomb. There is a big animated sign and an audio alert/countdown that turns on once the bomb is armed. The audio and visual alert also warns about the booby trap. Once it is armed, the riot police retreat to a safe distance. OF course multiple devices may be used. Of course there may be some broken glass but its a trade off.

For the rioters, you have a simple choice, stay in the area and get blown up or evacuate the area. If you did stay and died, you're a candidate for the Darwin awards.