Prometheus EG Spring Guide for Tokyo Marui NGRS SCAR / AK / G36

The Prometheus EG Spring Guide is a high-strength internal component specifically engineered for the Tokyo Marui Next Generation Recoil Shock (NGRS) series to reduce spring fatigue and mechanical friction. It features a rotating shaft constructed from self-lubricating POM material, which allows the mainspring to rotate freely during the compression and decompression cycle, eliminating torsional stress. By incorporating an integrated thrust bearing at the base, the unit ensures smooth spring movement and prevents binding, resulting in improved gearbox efficiency and consistent muzzle velocity. This extra-grade (EG) component is precision-machined to provide a durable reinforcement for high-performance builds requiring enhanced reliability and stable power output.