SHS Air Seal Reinforced chamber packing/AEG HOP UP Bucking(60 degree) - SHS
Komory i gumki Hop-up do replik ASG - Gunfire
VULPO SHS 60 Degree Hard Type Improved Hop Up Bucking Rubber for Airsoft AEG hunting Accessories Red|for airsoft|accessories for huntinghop up bucking - AliExpress
King Arms Hop Up Bucking 40 Degree Rubber (Blue) at AirsoftMaster.com