I may have to buy an old Mossberg Pump action shotgun equipped with a vari-choke "bulbous" adjustable abortion on the end of the barrel.

So the plan is to cut off the choke and have fitted a proper removable choke system like Briley.

My question is it worth considering a system which also has rifled chokes? Does Briley do these as well?

(I have the appropriate licence for the shotgun, don't worry about it.)