Complete Nautilus V2 Gearbox / 120 Spring https://krytac.com/nautilus-gearbox-120-spring/ more details pictures available Please look at my other listings for airsoft parts new and used. multiple orders will save on shipping costs with combined shipping Local meetups available around San Francisco Bay Area Umbrella armory UA PDW-M pdw aeg smg Krytac gate titan kwa Cyma sr25 m4 tk45c m4 mags