The Maple Leaf Hot Shot Hop Up Rubber Bucking (Crazy Jet). Works exclusively with the Crazy Jet barrel system from Maple Leaf. A very unique bucking. This bucking is designed to adapt the maple leaf crazy jet barrels, which are considered VSR/GBB cut barrels to be used in AEG hop-up systems. While AEG buckings typically require "windowed" or "bridged" barrels, the Maple Leaf Hot Shot series slide onto "open cut/bridgeless" barrels just as a VSR style bucking would, but with the appropriate outer diameter to accommodate AEG Hop-up chambers. The bucking is best used in conjunction with the Omega Hop-up Tensioner , and Crazy Jet Barrel to really maximize your range and rein in that left and right shot deviation! You can use this bucking with your AEG gun + a Crazy Jet Barrel. Regular AEG only buckings will not work with the Crazy Jet barrel. Not for use with regular AEG barrels. The 70 degree is good for M110-M140 spring types and most popular Maple Leaf Degree recommendations: 50 degree up to 360 FPS 60 degree 290-390 FPS 70 degree 355-460 FPS (most popular) 75 degree 420-490 FPS 80 degree 480 FPS or higher