Gaztañaga Destroyer was a semi-automatic pistol designed by Isidro Gaztañaga in Eibar, Basque Country, in 1913, using .25 ACP caliber.
It was produced in Gaztañaga y Companía, Eibar, Basque Country, and is notable for being a common Spanish handgun with the Eibar Type safety located above the grip.
It was followed in production by a .32 ACP version which was produced for the French army during World War I.
The standard magazine contained nine rounds, but in production models used only six or seven.
The weapon is a copy of John Browning's 1906 pistols.