The Autubot Decepticon bucking by Maple Leaf is one of the most consistent and accurate buckings on the market! This is one of the most valuable upgrades you can install into your airsoft replica, increasing your range and accuracy. 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 for improved long range performance Suitable for Marui / KJ GBB Pistols and VSR-10 compatible air cocking rifles Compatible with old style WE-Tech gas blowbacks.