Modern Firearms are defined by the ATF as firearms built after 1898.
Compare“CMMG 55A520BCT Dissent BR4 *CA Compliant 5.56 NATO 10+1 16.10" Black Nitride Threaded Barrel, Coyote Tan Cerakote Picatinny Rail Aluminum Receiver, Magpul SGA Black Synthetic Stock” has been added to the compare list