Try e-gunparts.com, gun show, gun shop, want ad.
100
The Brazilian CBC Model 586 shotgun typically uses Beretta/Benelli Mobil choke tubes, which are also known as the Maxis chokes. You can use choke tubes compatible with this system in your CBC Model 586 shotgun.
Made by CBC (Companhia Brasileira de Cartuchos), sold through FIE in Miami (they went out of business in 1990) Manufactured approx 1970-73 Inexpensive shotgun, worth maybe $75 if in good condition....
Maked from 1980's till 1990. From Brasil, CBC. Unexpensive and reliable, good for shot down pigeons or rabbits.
With a slug, maybe. You had better be able to put the slug in the eye at 50 yards.
You did not say what model, but most common is a licensed copy of the Remington 870. Go to the Remington website, and you can download the 870 Owner's manual.
i just paid $250 for one in excellent condition seconhand
CBC shotguns were made in Brazil and imported for sale by department store chains such as KMart. They are marked as to gauge, typically on the barrel.
South American manufacture, no historical data available.
About 100 USD
50-100 or so