Buildable desktop battleship. For a builder who wants a battleship on the desk instead of a sealed shelf model: arrange the bridge tower, radar tower, smokestacks and turrets anywhere on the studded deck, turn the main turret to aim, then load the dart and push the plunger. Take it apart and lay it out differently the next day.

A turret that turns and fires. The main turret sits on a turret base and swings freely on the deck. Behind its shell, a plunger and breech cap work as a spring-less push-launcher: seat the dart, push the plunger, and it fires. Every other piece clicks onto the 0.31 in-pitch stud-and-tube deck plate, so the ship can be rebuilt at will.

Twenty-three pieces, one ship. Twenty-three printed pieces make the ship: a studded deck plate with bow and stern sections, a bridge tower, a radar tower, two smokestacks, four secondary turrets, a three-barrel stern turret, turret base, turret shell, plunger, breech cap, dart, and six generic bricks in 2x4, 2x2 and 1x2 sizes.

9.4 in on a single 0.31 in pitch. Assembled, the battleship measures 9.4 in from bow to stern. Studs and tubes are cut to one consistent 0.31 in pitch, so bricks seat with an even hold and towers stand square. Surfaces keep a fine layer finish, with clean seams where each turret, stack and plate meets the deck.