Silverback MDRX 50 degree Flat Hop Up Rubber (4pack)

Silverback MDRX 50 degree Flat Hop Up Rubber (4pack) Rubber Construction AEG Airsoft Hop Up Rubber 50 Degree Hard This rubber can fit inside most of airsoft guns using ?AEG? hop-up rubber 5 dot lips design for bbs feeding, flat contact patch, similar to Silverback SRS-TAC41 and GBB hop-up rubbers Suitable For Silverback MDR-X Series Electric Gun AEG Airsoft Rifle Include 4 Piece