The weapon is based on the HK69A1 grenade launcher. The grenade launcher fires 40 mmgrenades greater distances than a person throwing a hand grenade and is about as effective as a pipe bomb. It is best for removing cover, such as a car, however, the grenade does not land in a particular spot, making it less accurate. The grenade detonates on a seven second fuse. Grenades can be fired at and bounced off walls to reach tricky targets. When engaging long range targets, the player must arc the shot (aim higher than the target) in order to compensate for gravity. Although the grenade launcher is ill-suited for aerial targets, the player can carry more rounds than the RPG allows. In the Ballad of Gay Tony, it features an interesting improvement in which the grenade explodes on impact if it hits a vehicle or person. Also, the time it takes for the grenade to explode has been shortened to about four seconds.
This article concerns a game that is unreleased. Some details may be speculative, and may turn out to be incorrect.
The Grenade Launcher returns in Grand Theft Auto V. It is now based on a multiple shot, revolver-type launcher, such as the Milkor MGL.
Unlike in The Lost and Damned, this launcher will be able to fire more than one grenade before reloading.
It was originally going to make an appearance in Grand Theft Auto: Vice City but was taken out without any explanation, perhaps because grenades work the same way, and the launcher was just an aimed version. Its model (grenlanc.dff) and its textures (grenlanc.txd), still remain on the PS2 disc. These files were removed from all other ports of the game.
Its possible to shoot down low flying choppers with a Grenade Launcher