Maple Leaf Super Hop Up Rubber for VSR & GBB

Description Suitable for Marui / WE / KJ GBB Pistol,  WE GBBRs and VSR-10 compatible Air Cocking Rifles – Slightly narrow entrance for better sealing to achieve more consistent power output. – C-Clip to enhance lip stiffness for further sealing – Special pressure point geometry reduces inconsistency between shots for more predictable trajectory NOTE: Due to special pressure point geometry, this product is optimized for use with inner barrels with open type hop up slot. (i.e. Marui original pistol inner barrel and most compatible inner barrels) Recommended hardness/FPS combinations: 50 degree: Up to 360 FPS 60 degree: 295-390 FPS 70 degree: 360-460 FPS 75 degree: 425-490 FPS 80 degree: 490 FPS up