Modern Firearms are defined by the ATF as firearms built after 1898.
Compare“Smith & Wesson 13536 M&P Shield Plus Micro-Compact Frame 9mm Luger 10+1/13+1, 3.10" Black Armornite Steel Barrel & Optic Cut/Serrated Stainless Steel Slide, Matte Black Polymer Frame, Thumb Safety” has been added to the compare list