1:144 turned ship barrels replace moulded artillery with machined brass. The listing covers a barrel set for the American Fletcher class destroyers, one of the most frequently built subjects in this scale. Each barrel is straight along its whole length, carries a drilled muzzle and steps down to the correct profile, which a two-part moulding never quite manages. Fitting takes a pin vice, a fresh blade and a drop of cyanoacrylate.
On a destroyer approaching a metre in length the five-inch mounts draw the eye before anything else, so swapping barrels is the quickest visible improvement available. Cut the plastic away, drill, seat the brass; an evening's work. Kits in the scale are under 1:144 ship model kits, every size of machined barrel under turned ship barrels, and superstructures sharpen up with 1:144 ship photo-etch.