Silverback SRS/ HTI Flat Hop Up Rubber for SRS Airsoft Rifle (50 degree/ 4pcs)

Silverback SRS/ HTI Flat Hop Up Rubber for SRS Airsoft Rifle (50 degree/ 4pcs) Rubber Construction 50 Degree Design For Replace the Original Parts Come With The Rubber Bucking +Nub Suitable For Silverback Desert Tech HTI Series Airsoft Sniper Rifle