Carlson's chokes has them for the Baikal. Also if you are at a retailer look for chokes made for the Remington Spartan, they are the same shotgun as the Baikal MP-153. Apart from losing a part, I couldn't imagine needing to ever replace a part on the Baikal. Mine had an honest 2000+ mainly heavy 3" and 3.5" waterfowl loads through it when I sold it, and didn't have a single problem (except for cycling lighter skeet/trap loads).