All of these magazines have been verified to have been manufactured prior to 9/13/1994, making them compliant in the state of Massachusetts. 
 
USA MAG - These magazines are New Old Stock, they have not been used, however their are minor signs of external wear from being moved around.  They were made by USA magazines, who went defunct before the 1994 ban was even an idea.  If you have any questions about these magazines dont hesitate to reach out to us.
 
PRO MAG - These magazines are also New Old Stock, Pro Mag updated their design for this Glock magazine well before the 1994 ban took place.  They are made of a durable polymer, much thicker than the early U-notch magazines.