Mr Ops

Mr Ops was the last class to get added to the game. He is an explosives expert, who receives less damage from the explosive weapons. However, he is definitely not outright immune to them, not even to his own explosions.

Keep in mind that his Nade Thrower is actually less powerful than the Grenade Launcher carried by Franklin, Triggerman and Vince, and it is unable to insta-kill any class besides Hunters. However, this is compensated for by its ammo capacity (25 nades, while the grenade launcher only has 5 grenades) and its rate of fire, which can be increased further through the Rapid Fire passive. Nades themselves have the same physics as those grenades, and so will bounce off of walls. While you don't need to worry much about killing yourself in this manner, getting reliable damage can be difficult, especially if you haven't had experience using the grenade launcher with the other classes. Pistol can be used to finish off enemies who got wounded by Nades, but it isn't recommended to take on the other classes with it alone.

Trivia

 * This class is based on Nademan from Karnage's direct predecessor, the 2D top-down shooter vertix.io. Nademan had 110 HP, and only carried a Nade Thrower, which was limited to 5 Nades. However, he could reload that weapon indefinitely, just like any other Vertix class, and he was completely immune to the damage from his own Nades.
 * Neither this class, nor any of its equivalents have yet appeared in the second Vertix "sequel", the 3D FPS krunker.io. This is likely because that game's fast movement speeds and 3D level geometry would make a class reliant on bouncing short-range, slow-travelling explosives far too unreliable, especially on that game's numerous custom levels.