2001 - the first 2 digits are the year of manufacture.
No, not yet
499$
Remington now imports the Baikal shotguns under their 'Spartan' brand. Barrels for the "Remington" Spartan SPR-453 are the same as your Baikal.
yes
See page 18 of the manual, available at the following link. http://www.eaacorp.com/Manuals/mp153.PDF
Yes, some of the remington tubes will but not all. I have a remington modified choke in my mp 153 right now.
Cleaning instructions start on page 20 of the owners manual which is available at the following link. http://www.eaacorp.com/Manuals/mp153.PDF
Parts for these shotguns are hard to find. EAA Corp carries parts for Baikal shotguns. A good gunsmith might also be able to help make some parts.
Remington Arms bought out Baikal firearms. A new Baikal model MP153 12 gauge shotgun can be purchased for $489.99 at Southern Trading Company and Pawn located in Bainbridge, Georgia (Contact Edwin McCullers at 229-248-0024).