 These are usually a more portable—and a more easily concealed—version of conventional sporting guns, commonly a single or double-barrelled shotgun based on the relatively affordable Belgian leClercq action.In this and in similar designs, a folding shotgun with a modest barrel length can be made to fold back until it lies beneath the stock and, thus, easily carried under a coat.An alternative form is in effect a very long-barrelled pistol fitted with a detachable, sometimes called "take-down", or folding skeleton stock, though any sporting weapon that requires assembly has obvious drawbacks in the field.