Modern Firearms are defined by the ATF as firearms built after 1898.
Compare“SAR USA SAR9SCG2BL SAR9 SC Gen2 Sub-Compact Frame 9mm Luger 15+1 12+1 3.30" Black Steel Barrel, Black Steel Optic Ready/Ported/Serrated Slide, Black Polymer Frame, Black Polymer Grip” has been added to the compare list