Maple Leaf Autobot Hop Up Bucking for Marui / WE GBB Pistol & VSR ( 75 Degree ) etc. The picatinny rail hub has

The picatinny rail hub has 4 mounting surfaces

WE GBB Gas Magazine Valve Key Tool

Adjustable Hop-Up System

used for hitting hard objects

GHK GBB Series ( Black )

Maple Leaf Autobot Hop Up Bucking for Marui / WE GBB Pistol & VSR ( 75 Degree ) etc. The picatinny rail hub has75 Degrees Rubber Made Suitable for Marui WE KJ GBB Pistols, WE GBBRs and VSR 10 compatible Air Cocking Rifles The properties of the rubber are highly elastic and anti wear. Slightly narrow entrance for better sealing to achieve more consistent power output. Special pressure point geometry greatly improves hop up performance and more predictable trajectory. C Clip to Enhance Lip Stiffness for Further Sealing NOTE: Due to special pressure point