Modern Firearms are defined by the ATF as firearms built after 1898.
Compare“Christensen Arms 8010612700 Ridgeline FFT Full Size 22-250 Rem 4+1, 20" Stainless Steel Threaded Barrel, Stainless Aluminum Receiver, Black w/Gray Accents Fixed Sporter w/Flash Forged Technology Stock” has been added to the compare list