Maple Leaf / Ra-Tech HopUp bucking for VSR sniper rifles and GBB guns. Slightly narrow entrance for better sealing to achieve more consistent power output. This is called Diamond shape and improove mainly shooting range. C-Clip to enhance lip stiffness for further sealing, but not neccessary to use. Depends on the user needs. Bucking is suitable for Marui / KJ GBB Pistols and VSR-10 compatible air cocking rifles
50° for guns with the output velocity bellow 110 m/s (360 FPS)
60° for guns with the output velocity 90 - 120m/s (295 - 400 FPS)
70° for guns with the output velocity 110 - 140 m/s (360 - 460 FPS)
75° for guns with the output velocity 130 - 150 m/s (430 - 500 FPS)
80° for guns with the output velocity above 150 m/s (500 FPS)