USGI Grease Gun
30 round factory magazine
USGI(United States Government Issue) Grease Gun 30 round magazine. These can be modified to fit in the Mac-10 in 45 acp. These were stored in oil based wax paper of some sort. The white spots you see on them are from some sort of Dry Lube.
PLEASE KNOW YOUR LOCAL LAWS
California Prohibits magazines over 10 rounds
Colorado Prohibits magazines over 15 rounds
Connecticut Prohibits magazines over 10 rounds
Hawaii Prohibits magazines over 10 rounds
Maryland Prohibits magazines over 10 rounds
Massachusettes Prohibits magazines over 10 rounds
New Jersey Prohibits magazines over 10 rounds
New York Prohibits magazines over 10 rounds
Vermont Prohibits rifle magazines over 10 rounds and handgun magazines over 15 rounds