Modern Firearms are defined by the ATF as firearms built after 1898.
Compare“Walther Arms 2858169 PDP Compact Frame 9mm Luger 10+1 5" Black Steel Barrel, Black Optic Ready/Serrated Steel Slide, Black Polymer Frame w/Picatinny Rail, Textured Polymer Grip, Ambidextrous” has been added to the compare list