The Instalaza C90 is a 90 millimetres (3.5 inches) disposable, shoulder-fired and one-man operated rocket-propelled grenade (RPG) launcher, which can be fitted with a VN38-C night vision device for full night combat capability.

[7] It is being used as an infantry-type weapon, with Instalaza also claiming it to be the, "lightest infantry weapons system in its class".

[6][8] The following are variants produced by Instalaza:[7] After the Russian invasion of Ukraine in 2022, the Spanish government, like other Western governments, sent Ukraine shipments of weapons, equipment, ammunition, and vehicles, including numerous C90 grenade launchers.

[9][10] There are images of at least one Russian infantry fighting vehicle being destroyed by a C-90 near Dronivka.

[11][12]