Received my answer from Benelli it was made in 2004 . I bought it in 2006 after having dinner at SHOT show with Tom Knapp and one of the Benelli VPs telling them I carried one on my last deployment.
Came with the full mag tube and collapsing stock. Got a smoking deal on it as well as I think they called it industry pricing at $720.00
I have a M4 with a serial number of Y0074xx
does this mean it was made in 2000? And does that hat add or subtract from its value? I bought it in 2007 from Benelli