Product Description5.7 10rd Mag Extension. The ultimate upgrade to your 5.7x28 pistol. Simply remove floor plate, inspect factory mag opening for burrs (remove burrs asnecessary) 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. Please Note: This description may represent a general group of products. Please read the item's title and specifications for more specific information about this particular item. |