5.7 10rd Mag Extension. The ultimate upgrade to your 5.7x28 pistol. Simply remove floor plate, inspect factory mag opening for burrs(remove burrs as necessary) install extension, insert spring and add floor plate. Installation takes only seconds and does not permanently alter factory magazine. Chrome silicon spring is salt water resistant and will not take a set.
Sold per EACH. Package includes all you need to easily install the extention onto your FiveseveN magazine (magazine not included). Gun and additional items not included.
