I went to a range in Leominster this morning and a gentleman named Tim (I think I know his last name but will keep that off the forum)was kind enough to let my kids fire his AR-15. He had a full size M&P 9mm so I let him try my 9C for comparison. When I picked up what I thought were my magazines, I inadvertently picked up one of his. If Tim is a member of this forum or if you know him, please send me an IM and I will get you your magazine back. I called the range but I think I the guy who answered was a little irritated since I am not a member yet. I am also planning on posting a sign at the range and will go there next Sunday as well.
Wish that I could help you out. I was in the ARMY stationed @ Ft Devens for a while in 1967. We used to frequent a local gin mill/dance hall called, "The Buttercup" in Leominster. Back in the day, i coulda left a scrawl on the wall of the men's room for ya..........