Maple Leaf Diamond Hop Up Rubber Bucking for use in VSR-10 rifles and WE/Marui/KJW gas guns - works in all airsoft gas guns with the exception of KWA.  Diamond style comes in a variety of different degrees with 70 degree the most popular and recommended.  The Diamond series buckings from Maple Leaf utilize a concave hop up system and are designed to be used with the Maple Leaf Omega Tensioner.  These buckings will fit GBB (WE/TM compatible) and VSR cut barrels (bridgeless).  

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