Your serial number indicates that it was made in the year 1969.
Date my Browning ser number 4t99577 O
04911py153
You will have to call Browning to find out.
what is the year made and value of ser. #'s 7g 10367 &236272 Belgium browning
Call Browning with the sn and they can tell you.
You must call Browning.
You must call Browning with the serial number.
Browning never made a model 306
Yes, they have made many BARs in 270
It is possible.
1972