Welcome to the site. We used to call the Poly choke a potato on the barrel. The old cutts compensator was tolerated a bit more but not a lot. I don't care for adjustable or changeable tubes myself. The poloy choke threw the gun out of balance and may or may not have worked. But it was unsightly. The screw in chokes are a much better alternative but they do put a small noticeable buldge in the barrel. I understand that the Briley chokes are very thin wall and no bludge.

In reality tho a barrel with a modified choke will handle most of what you might do. If your going to consentrate on ducks, I'd go with a full choke. Phesants , chukars, huns and paraire grouse, modified, mountain grouse and quail, imp cyl.

A bad thing about poly type chokes is you never seem to think it's the right choke when birds get up, so ya mess with it. At some point most guys that had them learned to set them and leave them alone, I never got that thru my head till I started buying fixed choke guns.

Ugly yes
I had an old Ithica Mod 37 12 guage with one on it. Bought the gun with the PC already on it at an auction. It actually worked well and after a few shots at cardboard boxes I had it figgered out. I ended up getting caught up in the looks and sold the gun.

My dad put one on a Rem 1100 so he could open the choke a little for tossing steel at ducks then screw it back down chasing turkey around. Works just fine for what he is doing with it.