Nerf Rival Hypnos Mod Guide - FIRST! - K26 Install Custom

Nerf Rival Hypnos modded with a K26 spring. Internal mechanisms demonstrated and advice on successful modding. I'm a high school science teacher, in British Columbia Canada, who sponsors a Nerf club and I also have fun tearing down, repairing, improving/modifying Nerf blasters. Let me know if you have any questions or constructive comments for future walkthroughs or updates.