You will need the services of a gunsmith
You will have to call Browning with the sn to find out.
Browning, gun shop, gun show
Serial number data can be located on the Browning website, Blue Book of Gun values and Browning Dates of Manufacture book.
You are going to have to identify the model number to determine the age. Take the gun to a gun shop or gun smith for assistance.
Impossible to answer without the serial number
Take it to a Browning trained gun smith
Your best bet is to go to Browning's web site and request a manual. You don't mention if it is a over/under, side by side, pump or semi-auto.
well... it depends on the type of gun if it was a maverik then you have to open it up and take off the air restrictors by drilling through it , on the other hand if it was a longshot then you would have to take the gun apart. In my opinion the bigger the gun the harder to mod
A gun manufactured by Browning Arms
Please provide a serial number and ask again
Not quite sure which model you have. Use the link below to find the owners manual for your gun. Follow the manual for dissassembly.
I cannot asses a value unless You post the handgun model of your browning along with the serial number.