i just purchased a new SA-20 Turkey Thug - but don't have it yet. Looking to order some new TruGlo sights before it arrives. MY question.. does anyone know the width of the vent rib? Is it the same as the Moss 500, 835 etc?? They have the mossbergs models listed but no SA-20. I know this gun is a little different since it's mossberg international. Already found out the choke threads are not standard mossberg and in fact Beretta/Bellini.