Modern Firearms are defined by the ATF as firearms built after 1898.
Compare“FN 66100572 509C MRD Compact Frame9mm Luger 10+1 3.70" Black Recessed Target Crown Steel Barrel, Black PVD Optic Ready/Serrated Steel Slide & Polymer Frame w/Picatinny Rail, Ambidextrous” has been added to the compare list