Modern Firearms are defined by the ATF as firearms built after 1898.
Compare“Winchester Repeating Arms 512297692 SXP Trap Compact 20 Gauge 28" 4+1 3" Matte Black Rec/Barrel Satin Walnut Fixed with High Profile Trap Comb Stock Right Hand Includes 3 Invector-Plus Chokes” has been added to the compare list