It has not been made yet.
The suffix of M71 was assigned to the Browning model BAR(Browning semi-auto rifle) which was made in the year 1971 in Belgium for Browning.
what is your question?
Sometime in the 80s. You will have to call Browning to narrow it down further.
Most likely, yes.
By including the serial number in your question.
Browning has made one in the past
Comparison to known grades.
Comparison to known serial numbers.
If you are asking about a Browning BAR rifle,then it was made in the year 1968.
Your browning safari bolt action rifle was made in 1970.
Your Browning model safari bolt action rifle was made by FN of belguim for Browning in 1969,with the serial number that you provided.
your browning 22 was made in 1963.