Prometheus Hop Up Rubber For Marui AEG Series

- Designed for low stress and high performance. 
-Featuring the zero inner hump.( no hump inside just plane rubber chamber packing )
-Enhance BB flight in long and straight path.
-Super hop up effect, very effective even with heavy gram BBs.


This hop up rubber designed to be paired with the hop buffer bridge (product code: PROM-PT-179192-AG) and prometheus 6.03 inner barrel, great for all fps set up, especially, 400fps and above