Impossible to answer without a serial number and detailed description.
Call Browning.
No serial number = no way to answer.
You must call Browning with the serial number to find out.
The MW in your serial number indicates that the browning shotgun in question was made in the year 2004.
Go to Browning's site, Support, Date Your Shotgun.
With the serial number that you provided,if you have a Browning model auto-5 shotgun?Then this shotgun was made by FN of belguim for Browning in 1939.
1977
2006
In order to date your Browning sweet sixteen model auto-5 shotgun,you must include the serial number in your question.
You will have to call Browning an provide them with the sn to find out.
1951
It was made in 1981.