Modern Firearms are defined by the ATF as firearms built after 1898.
Compare“Glock UG4030103MOS G40 Gen4 Competition MOS 10mm Auto 15+1 6.02" Steel Barrel, Matte Black MOS Cut/Serrated Steel Slide, Black Polymer Frame w/Picatinny Rail, Black Interchangeable Backstrap Grip” has been added to the compare list