The Glock 37 is a pistol produced and manufactured by Glock of Austria. The G37 is a Glock 17 modified to fire the more powerful .45 GAP ammunition.
The Glock 38 is a pistol manufactured and designed by the Austrian Company, Glock and released originally exclusively in the United States.
HS Produkt (formerly I.M. Metal) manufactures these weapons in the city of Ozalj, Croatia and then licenses and sells the weapons in the US by Springfield Armory.