Briley makes choke tubes for Yildiz guns but only in 12 gauge Trulock is making them now in standard and extended versions. http://www.trulockchokes.com
Tubes that constrict the column of shotgun pellets as they exit the barrel
For the Stoeger side-by-side shotgun, your best bet would be to use any of the standard Winchester choke tubes. They should fit well for you shotgun.
# They relate to choke type, i.e., full, modified....
System of changable shotgun choke tubes made by Mossberg. Accu Choke is their brand name. A shotgun choke is a means of reducing the bore size at the muzzle of a shotgun, to produce shot patterns that spread to a greater or lesser degree.
If it has choke tubes, yes. If it is fixed choke, no. I called Browning about mine and that was the answer they gave me.
The shotgun in question uses a standard Tru-Choke.
What gauge and grade is it?
A 12 gauge shotgun with changeable choke tubes that fires 3.5" shells.
Invector was Brownings original choke tubes that came out in 1983. Invector Plus came along later for the back bored barrel shotguns. They are not interchangeable. Invector Plus= late model shotgun, Invector = earlier design shotgun. Both are still available for purchase.