CORE has developed a great marker upgrade for attaching or removing you paintball hoppers & loaders. Typically most feedneck requires tools to remove hoppers but with feednecks like CORE'sClamping feedneck, there is no need for tools. Clamping features make it more simple to just open or close the clamp which allows for ease of the removal or attaching of a hopper. The CORE Clamping Feedneck replaces the stock feedneck and elbow with a tough machined aluminum piece featuring a bicycle-style quick release clamp. Grips your loader like a vice to let you concentrate on the game, not your marker! We have these for Kingman Spyderswith holesorwithout holesand for SmartPartsIon.