Since the date of manufacture was removed when the barrel was changed out. I’m not sure when the M40’s were discontinued. The serial number dating isn’t exact but:

I’m on my phone rather than a computer so I can’t get you the thread address but this info from another 24 hour post might help

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Last edited by Bugger; 05/19/23.
I prefer classic.
Semper Fi
I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally