R&D has gone from "peeved and suspicious" to downright hostile. Should a troubleshooter team reach the point where they have destroyed all 3 of the recorderbot models, than R&D will send in the AVENGER. The 4.2 model has no other purpose than to serve as judge, jury and executioner in the field. The entire bot is covered in military-grade yellow reflec and the bot can operate in any environment. Not really sanctioned by The Computer, this is what R&D can do when it really tries.

Part 1: Stability
R&D has returned to the stability of wheels, putting the RB4 on a tripod of individually powered and fully autonomous wheels. Each coaster-type wheel can rotate completely around and is mounted on an adjustable boom that can lower the main body to the ground for further stability. With the body lowered, the bot's center of gravity makes it exceptionally difficult to tip.

Part 2: Detective
The new bot has a high powered brain, with a complex treason-sensing system that will hunt down and execute any traitors found in the team. It will not, under any circumstances, follow any orders from the team. In fact, the bot's voice-processing systems are only used to search out traitors and cannot be processed as commands. The bot has kept the spherical, spinning camera rig. The system feeds data to the bot's brain (shielded in the body) where it is picked over for treasonous material. The cameras also sport heat, low-light and ultraviolet settings.

Part 3: Executioner
The bot carries 3 weapons and can track up to 280 targets at once. The pulse cannon has a nearly complete range of motion and fires powerful bursts of energy. On the bot's left arm is a massive slug-thrower gattling system connected to an armored ammo drum on its back. It can fire 50 slugs per minute if it targets each shot, and it can empty the 20,000 rounds in less than 2 minutes into a single target. On the bot's right arm is a canister-gun, armed with both gas and standard grenades.

Part 4: Wait for it...
The bot is purely designed to decimate a troubleshooter team thus delivering a dish of revenge courtesy R&D. There is simply no other rational use for it. The bot will absolutlely ignore the troubleshooters, will not let them out of its sight and will not stop hunting them once it has labelled them a traitor. The only ways a team can escape is to split up, and even that is a delaying tactic at best, or to stay on their best non-treasonous behavior. Mourn the team-member who yells "Commie Mutant Traitor" while this bot is on duty.