Modern Firearms are defined by the ATF as firearms built after 1898.
Compare“HK 81001076 SP5K-PDW RAL8000 9mmx19 30+1 4.53" Black Navy-Style Threaded Barrel, Flat Dark Earth Earth Cerakote Steel Receiver & Frame, FDE Polymer Grip, 2 Magazines” has been added to the compare list
Compare“GLFA GL15223 TNG 223 WYLDE RIFLE TUNGSTEN” has been added to the compare list