Modern Firearms are defined by the ATF as firearms built after 1898.
Compare“CMMG 64A190CAB Dissent BR4 *CA Compliant 6.5 Grendel 10+1 16.10" Black Nitride Threaded Barrel, Black Armor Cerakote Picatinny Rail Aluminum Receiver, Magpul SGA Black Synthetic Stock” has been added to the compare list