Red Skorpion Lobber are enemies found in Wasteland 2.
Lobbers are members of the Red Skorpion Militia. They are named so because they use explosives in combat.
A Lobber at the Prison will only have TNT equipped and it won't be very damaging, though you should avoid placing multiple members close to each other to be caught in the blast. It is therefore recommended that you focus on other enemies. The ones in random encounters will have Pipe Bombs equipped, though they have less CON.
Four more can be found near the RSM HQ in the actual "Prison" area, two each in the scrapyard and the cave respectively.