Modern Firearms are defined by the ATF as firearms built after 1898.
Compare“ATI ATIGAX5569ML Alpha-15 Maxx 5.56x45mm NATO 30+1 16" Black Threaded Barrel, Black Picatinny Rail Polymer Receiver, 9" Polymer Handguard, ATI MM4 Black Synthetic Stock, Black Polymer Grip, Right Hand” has been added to the compare list