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 Delta shape and improove mainly accuracy. 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
