Prometheus Hop Up Rubber for Marui AEG series

Prometheus Hop Up Rubber for Marui AEG series Rubber Construction Designed for low stress and high performance Suitable For Tokyo Marui AEG Rifle Designed to be paired with the hop buffer bridge (product code: PR-4560329179192) and prometheus 6.03 inner barrel, great for all fps set up, especially, 400fps and above.