best left to a gunsmith
40-140 dollars depending on condition and a good bore.
Follow the instructions in the owner's manual. If you do not have one, go to Browning.com and request one.
Gun shops, gun shows, want ads
Try e-gunparts.com
Take it to a local gunsmith and ask for help.
6
14 gauge has been made.
No
Don't. Take it to a gunsmith and have it done correctly. You'll be glad you did once you try to put it back together again. Trust me, I am a gunsmith. lcj
Brazil 12 gauge single shot gun
No one.
50 USD