These vertical grips come in both new and pre-owned condition. Pre-owned means that there is some obvious wear from use, but the grip is still in good condition. These vertical grips are used by the US military. These grips mount to any standard rails on firearms and help the user control their firearm during use. P&S vertical grips are of the same type that Knights Armament Company makes for the US military so they can be trusted to preform for you under stress!