I just bought one.I been doing some searching on it. Some smiths will work on them some won't Neil Jones is supposed to be the man to have it done by. www.neiljones.com/
Another thing you can do is check with one of the Browning authorized service centers.They are listed on Browning website. Since I posted my first answer I called one. Thats were I"am going to take mine he's only 25 mi. away