Despite becoming quickly obsolete, the grenade remained in service post-war as an anti-personnel weapon, and it was also effective against defensive positions such as bunkers or machine gun nests.

[7] In July 1941, Main Artillery Directorate issued an order to begin mass production of these grenades as soon as possible.

VI "Tiger" heavy tank (which was captured by Red Army on the Volkhov Front).

As a result, it was found that the RPG-40 can destroy the Tiger's tracked treads, but is no longer able to penetrate its thick side armor.

After that, the RPG-40 was replaced by the RPG-43[2] and RPG-6, both designs used a shaped charge warhead to provide better penetration, but it remained in use as an anti-personnel (despite its short range) and anti-bunker weapon.