Most standard hop-up chambers don't satisfy the players with their characteristics. They are too fragile, poorly feeding and spinning the bbs. Therefore, players choose to use custom parts.   

This hop-up chamber provides exceptional durability and reliability due to the use of aluminum fittings and a spigoted feeding system that prevents the bb from warping.   

This detail allows you to adjust the hop-up ball easier and more precise, and the hop-up itself works with consistently high compression and feed. Made from duraluminum on high-precision CNC machines.