According to plans, the main recipient of RGP-40 would be the Polish Armed Forces, which according to the estimates, would require about 500 multiple-shot grenade launchers.

[2] During 2021–2022 Russo-Ukrainian crisis, in early 2022 a batch of stored RGP-40 was given by Polish government to Ukraine, and then used by Ukrainian Ground Forces.

The spring-driven cylinder rotates automatically 60° while firing, but it must be wound back up after every reloading.

While shooting the drum is rotated 60 degrees by the springs wound back up when loading the cartridges into weapon.

To prevent accidental engagement and firing, there is an ambidextrous safety selector at the top of pistol grip.