New Black Dog Machine brand .22LR caliber 50 round drum magazines for Smith & Wesson M&P15-22 rifles. Hightly reliable feeding. Injection molded from high-impact polycarbonate. Easily dissassembles for cleaning. Made in the USA.
Also fits Atchisson/Ceiner conversions, Kel-tec PLR/SU, Sig 522, Spike's Tactical, Tac-Sol .22 uppers, Model 1 Sales .22 uppers, CMMG conversions.
Will NOT work with Colt .22, & Olympic Arms.