Nerf Rival Kronos Spring Spacer

thingiverse

Spring Spacer for Nerf Kronos/Heracles/Mercury (identical internals) Boosts spring compression for faster fps, resulting in approximately 15fps higher than stock on my blaster. Measures 7mm tall, the maximum height that still fits snugly. Unlike most spacers, this one mounts directly into the spring stop on the Frame/Catch side rather than the Plunger Head. This design simplifies it to a straightforward ring shape, reducing moving mass compared to other designs. Refer to the photo for the installation location. Important Note: Different production runs of Kronos and its re-shells have shipped with varying springs, even within the same model! You may need to calibrate and adjust the z-axis to fine-tune spacer height for certain variants. Tip: Kronos springs remain under compression at all times, even when not primed. To make reassembly easier, manually catch the spring during reinstall.