Clamp on shotgun sights

[66chevelle]

I am looking for rifle sights that I can clamp on the rib of my shotgun barrel. I know truglo makes a set called magnum gobble. I am curios if anyone has used these if you have what did you like and dislike about them? Does anyone make a better set? Thanks

 

[Carey]

Wouldn't it be easier to get a different barrel for it? I think I would be scared that they would come loose.

 

[66chevelle]

No I am using this gun for still board/turkey shoots. They rules are stock gun with a .675 choke and open sights. I am trying to get a better sight picture over the one bead at the end of my barrel.
I am also worried about the screws that is why I am looking for some advice.