Stalcraft Wiki: RAPS AH-5 Pilgrim

In-game description (EXBO)

Despite the success of AH-4, Research Institute 7 aimed to create a full-fledged counterpart to ZIVCAS developments, which led to the continuation of work on the Artifact Hunters series. The optimization of the exoskeleton made by Horizon not only enhanced protection against external impacts but also increased the load capacity of the suit. Unfortunately for the engineers, the initial tests revealed that such a configuration placed too much strain on the servomotors, reducing mobility. Nevertheless, the institute's management decided to put a trial batch on the market to gauge consumer reaction to this engineering solution.

Quoted from the game's own text in EXBO's public game data. Not written by STALCRAFT Meta.