maple leaf mr gbb silikone hop up gummiMaple Leafs MR rubber is the perfect rubber for those looking for maximum precision for your pistol or VSR. With their concave inner nub, there is maximum contact surface every time, and a c clip is also included to get optimal tightness with your nozzle. Fits all GBB weapons that use TM spec hop up rubber. The silicone version heats up faster than regular hop up rubbers and therefore works a little better in winter. For optimal rubber selection,