M3 Grease Gun Magazine 30 rounds .45ACP. These can be modified to fit MAC-10s in .45ACP: http://www.uzitalk.com/forums/showthread.php?52576-Grease-gun-mag-conversion*US sales only* *No shipping to states with magazine restrictions*..
These reproduction 50 round steel drum magazines were
made using original blueprints by a reputable defense contractor. Fits
.45 ACP models 1928, 1921, 1927A1 and currently produced commercial
semi-auto models. Blued steel. Over 500 sold, 100% ..