Modern Firearms are defined by the ATF as firearms built after 1898.
Compare“Black Rain Ordnance Spec15 5.56 NATO 30+1 10.50" Black Nitride Steel Barrel, 10" M-LOK Handguard, Black Anodized Aluminum Picatinny Rail Receiver, Tactical SBA3 Brace, Black G.I. Grip” has been added to the compare list