The title "Gunmaker-in-ordinary" is an honour. The word "ordinary" means that the gunmaker has become a regular supplier of the king, and not any common gunmaker. Some "gunmakers-in-ordinary" are were John Cosens, Nicolas Boutet, Mortimer, James Willmore, William Moore, Joseph Manton, or Lepage.

They did not necessarily make guns for the king to use, but often made guns that were presented by the king as a gift.

Pete

http://www.damascus-barrels.com/Movie.html