1780 in I. 372 The warrant for Six thousand pounds on account of the Gun Factory.
1812 3 60/2 Messrs. Coggswell and Hosford are erecting a gun factory in Albany.
1876 G. E. Voyle & G. de Saint-Clair-Stevenson (ed. 3) (at cited word) Elswick..was formerly an adjunct of the Royal Gun Factory.