Want this question answered?
No
none
£475 English pounds from York Guns
yes
Any reputable gun dealer should be able to source an extension mount for the Baikal single shot rifle. Millet make mounts suitable for the Baikal rifle
.410
gun powder
Shotguns fire shot shells. Handguns can fire specially made shotshells.
Any gun store sells it. Commonly shotgun shells #8 or #9 shot.
75-225 USD
Many fine 20 gauge shells are made.
About $100 to $200