Taran Tactical New and improved spring provides increased power, durability, and is preset for ease of use. Given that this spring is compressed and preset it will not require multiple test loads in order to achieve full capacity. This spring will be immediately ready to use and with our revisions to the final coil it will make installation a seamless process! Our redesigned spring functions across multiple base pads including our +5/6 Full Size Glock Extensions, +4/5 Glock Compact Extensions, and XD(M)/Echelon +2/3 Magazine Extensions. With increased wire diameter we have improved the strength and reliability for a spring that will withstand any tactical situation!