"Maximum Range" MR.HOP

Features:

- For GBB/VSR10 spec inner barrel, modification not necessary

- Larger & wider contact patch for better hop effect with heavy BB's

- For Heavy BB pellet only

- The "Shield" shaped groove design has better hop effect when tensioner/lever presses it

- Retains the steel "C-ring" design for airseal from "Transformer HOP"series