They identify which chokes you have in without having to use a choke tool. different companies have different markings but in general the fewer marks, the more constricted the choke (1 mark=full choke).
Go to Remington.com and download an owner's manual. most modern choke tubes have some type of marking that will allow you to determine the choke without removing it from the barrel. some use a notch system while others have stars.
Browning made choke tubes.
Modified describes a choke. Invector is a system of choke tubes.
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.
Should have choke tubes, being that you can change it to whatever choke you want, so there would be no marking on the gun. There would be markings on the end of the choke tube though, usually between 1-5 lines. Not positive on which means what, but I believe the higher the number the tighter the pattern. But take that with a grain of salt.
Tubes that constrict the column of shotgun pellets as they exit the barrel
Only with cylinder and improved cylinder choke tubes.
Try Mid West Gun Works.
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.
Yes, some of the remington tubes will but not all. I have a remington modified choke in my mp 153 right now.
To determine different shot patterns
# They relate to choke type, i.e., full, modified....