on a single shot barrel you must remove the barrel and look at the flat side underneath the chamber to see the choke stamping.
Choke markings , lets see , Chokemarkings , and Prints of Markings :D
http://www.trulockchokes.com/cgi-bin/eShop/index.cgi
The fixed choke markings are denoted by * marks on the bottom of the barrel under the forearm assembly. 3 on the left barrel and 4 on the right. *** Modified choke **** Improved Cylinder
IZ shotguns, also the Baikal brand use the TruChoke system sold also by Colonial Arms. This is the same choke style used by the Remington Spartan line while Remington owned the rights to the Baikal design.
On the choke tubes. It is marked by lines on the front edge of the choke. The more lines the more open the choke. 1 line is a full and goes from there. If it doesn't have tubes, on the inside of the receiver near the bbls.
one star or (*) means Full two (**) Improved Modified three (***) Modified Four (****) Improved Cyl.
I am a gun dealer in Asheboro, NC (Franks gun and pawn). Yes, the Baikal choke tubes will fit. This gun is made by Baikal for Remington. It used to be imported under the EAA name. You can also get tubes at Colonial choke tubes.
None
Made in Russiahttp://www.baikalcanada.com/home.htm
Remington now imports the Baikal shotguns under their 'Spartan' brand. Barrels for the "Remington" Spartan SPR-453 are the same as your Baikal.
18.4
Depends on how choke markings on the weapon.