There are very few new guns to my awareness which now offer a ribless option. The Perazzi HPX (which can be specc'd to 34" barrels) has no mid-rib (i.e. between the two barrels of an over and under) but other than that, it is very rare to see this.
Of the orders for the new Boxall O/U, I am led to believe a number have been for the ribless (no top rib) option, so clearly there is good interest. I shot both prototypes - ribbed and ribless and preferred the latter, both from a handling perspective, but also from an aesthetics viewpoint.
