Seven barrelled volley gun. The (possibly walnut) stock extends only as far forward as the front of the trigger guard and is shaped both sides for lockplate and sideplate. Brass buttplate with scalloped edge on top. Brass sideplate and plain brass trigger guard. Three brass ramrod pipes, the foremost incorporates a steel spring to retain the ramrod in place. Steel ramrod with threaded rear tip and swollen front end. The lock is a sidelock flintlock. The barrels are rifled. Six are arranged equidistantly in a circular round the seventh. The barrels are brazed together after being screwed to an iron plate set into the stock. The calibre is 0.5in. Stamped on the barrels are a Tower view and proof marks for private arms and the name 'H NOCK'. Engraved on the lockplate is a crown over 'GR', 'TOWER' and a crown over broad arrow.

These volley guns were designed by James Wilson and presented to the Board of Ordnance for trials in 1779. The Board decided these guns would be of most use on board ships and consequently they were purchased by the Admiralty for use in the fighting tops of naval vessels. Henry Nock became sole supplier of these weapons to the Navy. It appears that their first use was with Admiral Howe's fleet at the siege of Gibraltar in 1782. However, as all seven barrels fired at once, there was considerable risk of setting fire to the sails and thus the entire ship and so these guns were seldom used on board ship. Also as the barrels were rifled, they were difficult to load as well as delivering a ferocious kick from the recoil.