Choke tubes

[Woodeneye]

I recently purchased a Mossberg 500 combo and it came with 3 choke tubes,can anyone tell me the difference between the 3?Thanks for any responces.

 

[CoryTheCowboy]

I would guess that you got a IC (improved cylinder), modified and a full. Depending on what you're using the gun for will tell you what choke you need to use.

This looks like a decent article

http://www.wikihow.com/Choose-Shotgun-Shells-and-Chokes

 

[mattress_16]

My brother just picked up a Mossberg 500. I found this to be quite helpful:

http://www.mossberg.com/content.asp?ID=508&section=resources