Dr. Black 70 degree Hop Up Bucking for GBB Airsoft Pistol

Dr. Black 70 degree Hop Up Bucking for GBB Airsoft Pistol Rubber Construction Airsoft Hop Up Rubber (70 degree) TYPE-U design Designed to prevent sticking or slipping with the nozzle Enhances the chamber loading process Provides a stable trajectory for BBs Suitable For GBB Airsoft Pistol