No way of answering this without knowing the make and model.
Need to know make and model in order to be able to answer this.
3x9
1982-1987
No sn and no description = no way to answer.
Best to ask a gunsmith for assistance.
There is no such weapon made by Browning. Browning does make a semi-auto of the BAR in 30-06. You can download or request a manual from the Browning web site.
0- 550 usd
100-1000 or more depending on specifics
100-1500 usd
Left hand side of receiver, above the trigger.
This would be a Browning BAR semi-auto rifle
Nobody