FN FiveSeven 10 Round Magazine Extension Convert 20 To A 30 Rnds

5.7 10rd Mag Extension

This will turn your 20 Round FN 5.7 Magazines into a 30 Round Magazine.

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.

Five Seven