True, it is grenade launcher. One thing that makes it more rifle like is the trajectory, it's much flatter than a 40mm grenade launcher. M203 and M320 grenade l

True, it is grenade launcher. One thing that makes it more rifle like is the trajectory, it's much flatter than a 40mm grenade launcher. M203 and M320 grenade launchers launch long range grenades in a high arch, like a long football pass.