This paper presents the redesign of the FPW-50 tactical water filter aimed at simplifying its structure and improving manufacturing efficiency. The core modification involved the integration of several functional components—such as the pump frame, valve assembly, connectors, and housing—into a single element manufactured using selective laser sintering (SLS) with nylon-based material. As a result, the number of parts required for assembly was reduced by approximately 75%, with an estimated 60% reduction in total production time. Additional modifications included the replacement of traditional materials (e.g., plywood and steel) with polymer-based components, as well as the implementation of updated chemical dosing agents and an auxiliary photovoltaic power source. The changes were introduced to improve operational reliability, reduce corrosion risks, and enhance field deployment capabilities. The modernization demonstrates the potential of additive manufacturing to streamline the design and production of compact water treatment systems intended for mobile applications.