Grenade Launcher

The Grenade Launcher is an attachment in BlastGen. It is the tenth attachment unlocked for assault rifles and the final attachment unlocked for the HK418.

Info
It is an underbarrel grenade launcher with one grenade loaded and two in reserve. If the attachment is equipped, then the player will have a bandolier with spare grenades, and a blast mask. Damage wise, it does a large 500 damage within the explosion and 100 damage if its a direct impact. What is unique about the Grenade Launcher is that it has a set "safe arming distance". The grenades will only explode if it hits the ground from at least 4 feet away. It will not explode if it hits lower than that. The fact that it only carries one grenade at any given time is a risk factor, as the player will need to reload in order to fire another shot, which may end up in them being killed by stray gunfire while reloading. However, the reload time is quick, clocking at 2 seconds, so this shouldn't be much of a problem. It is one of the most popular attachments in the game, since it is fairly accurate and useful for clearing out rooms. However, the Masterkey is much more reliable in this case, as it carries more ammo, is a shotgun, and is extremely effective in close range. However, the Masterkey reloads slower, at about the same speed as the Mossberg 500A.

Campaign
The Grenade Launcher is a default attachment for the unusable M4A1 Grenadier variant used by allies. The grenade launcher isn't actually used, so its merely cosmetic in this case.

Zombies
It is attached to the upgraded M16 and is a random attachment that can be dropped by Armored Zombies. It is much rarer than the Masterkey. Unlike in Multiplayer, the Grenade Launcher in Zombies does not have a safe arming distance, meaning the grenades will explode no matter how close the grenade is fired. If attached to a weapon and not upgraded, the grenades do 800 damage with a 2x damage multiplier if its a direct hit, with one grenade loaded and ten in reserve. It is effective until roughly round 17, where it will take 2 direct impacts instead of one. The upgraded grenade launcher that comes with the the upgraded M16 deals a massive 1600 damage and will deal a gargantuan 3200 damage if a grenade directly hits a zombie. It carries 3 grenades and carries 24 in reserve. It is effective until round 33, where it will no longer kill with one direct impact. It is useful for clearing out swarms of zombies, but its better to use the RPG since it has more ammo, especially its upgraded variant, and deals more damage and has a larger damage radius.

Trivia

 * When attached to the AK-47, it will use the GP-25 model, and if it is attached to the ACR, it will use the M320 model, while other assault rifles and the HK418 will use the M203 model.