MR Hop Silicon VSR/GBB Bucking 60º (yellow)

"Maximum Range" MR.HOP Silicon

features:
 ●For GBB/VSR10 spec inner barrel and without modify
 ●Larger & wider contact area inside of BB pellet, has better hop effect with heavy BB
 ●For Heavy BB pellet only
 ●The "Shield" shape groove design has better hop effect when tensioner/lever press it
 ●Retain the steel "C-ring" design for airseal from "Transformer HOP"series