Answer:
Browning offers extra barrels for the following shotguns:

• A5
  
• BPS
• Silver

We do not offer extra barrels or make extra barrels for the Citori, Cynergy, BT-99 or BT-100 as the cost is prohibitive.

For those guns that we do offer barrels for, please see your local Browning dealer or you may also order direct from Browning.

United States customers call or write:

Browning Customer Service
One Browning Place
Morgan,Utah 84050-9326
1-800-333-3288

Canadian customers call or write:

Browning Canada Sports Ltd
5583 Chemin St-François
St-Laurent, Quebec H4S 1W6
514-333-7261