Yes, they describe the various chokes.
Modified.
By opening up or constricting.
It was manufatured by Fuji Arms in Japan
Chokes for shotguns shrink the bore's diameter to tighten the shot pattern and increase practical range.
they help with patterns of shot and accuracy of slugs
A good basic article on chokes http://www.ssaa.org.au/stories/shotguns-a-beginners-guide-to-shotgun-chokes.html
Try e-gunparts.com
Refers to the amount of constriction at the muzzle.
Yes chokes are designed to tighten shot patterns.
I paid 425 with the camo , the slugbarrel and chokes
With standard chokes, Full Choke is the tightest. However, there are non-standard chokes for SOME shotguns (used by turkey hunters) that are Extra Full Choke.