NORDIC +3 MXT KIT 12GA BK NEEDS NUT

Nordic Components MXT Magazine Extension Kit, +3, 12GA, Combines with Nordic MXT Extension Nuts to Form Complete Extension Kit, Shotgun-Specific Nut Required for Installation on Shotgun MXT-TBS-12-3K

Used in conjunction with the 12 gauge extension tube nut, this tube kit will add three rounds to your existing magazine capacity.