probably not, historicly shotguns are smoothbore if you shoot a slug, THAT would be rifled.
nowhere
Remington now imports the Baikal shotguns under their 'Spartan' brand. Barrels for the "Remington" Spartan SPR-453 are the same as your Baikal.
SORRY, you will never find any because there are none available !
To remove the barrels from a Baikal TOZ-34FP shotgun, first ensure the firearm is unloaded and safe. Then, locate the barrel release lever, usually found on the underside of the action. Press or pull the lever while simultaneously lifting the barrels upward from the receiver. Once the barrels are detached, you can proceed with cleaning or maintenance as needed. Always refer to the manufacturer's manual for specific instructions and safety precautions.
On the Baikal/Remington SPR 310 O/U, you simply push the trigger forward to select the top barrel, leave it alone to have the bottom barrel fire first.
They probably denote what choke the barrel has.
Excelent single barrel shotgun... inexpensive russian made!
Rifle, handgun and shotgun can all have "long" barrels
The cartridges will pop out.
I would look at the number of barrels. If there is more than one barrel, you know you have at least a double barrel shotgun. If there are 1 or less barrels, then you don't.
Generally, no. While single shot rifles MAY have the rifle barrel replaced with a shotgun barrel, reverse is not true (usually) A rifle cartridge generates much higher pressures than a shotgun shell.
That would depend on the make and model of the shotgun in question,and the length of the barrel/barrels that came with the shotgun.