Uh... it's all in green surplus cans from what I've seen. Whether or not it will still go bang after being stored in basements, attics, and garages with seasonal humidity and temperature changes is another story.
The Commonwealth in its smugness in 1998 had no idea the consequences of their f***ery. 1.2 million license holders didn't just have their hardware disappear. It just stopped being recorded. Cheryl Jacques and company created a massive underground armory without thinking about it. All that gear is getting quietly passed down in families, off the books, and kept out of sight. Probably more than half to three quarters of the guns in the state are off the books to non-current license holders because the legislature was too busy jacking each other to country club donor money to understand their scribbles in the MGL meant f*** nothing to a large number of people.