I have usedadjustable chokes all of th time while growing up. The other brand is "poly choke" I think they are one of the originators. My dad purchased one of the Tru Glow Titan chokes and I am going to use it for Pheasant hunting next month. I like them becuase if the birds are running or going up real close I always have the right choke; I can adjust on the fly.
Ingoldx1