HIghly recommend you leave this to a trained gunmsith.
Best left to a gunsmith.
Do not atttempt this. Find a gunsmith.
You will need to call Browning.
This is best left to a factory trained gunsmith.
100-1000 or more depending on EXACTLY what you have.
There are many things to consider. Age, condition, scope... Say $3-600.
First, get a copy of the owner's manual. If it was made by Browning, go to Browning.com and request one. Second, follow the instructions.
If you are not trained to do this, I recommend you do not try it. Chances are better than even you will be taking a box of parts in to a gunsmith and that's not good.
Browning will send you an owner's manual for free if you request. Otherwise, ask a gunsmith for help
Download a manual from Browning or take it to a gunsmith
The browning web site will provide this info.
Let a gunsmith do it.