The Mk. 19 is a non-canon, automatic grenade launcher featured in some fanon maps.
Remember When...[]
The Mk. 19 appears in the Remember When... storyline maps, Schule der Untoten and Einen Langsamen Tod. It has a slow rate of fire, no penetration power and moderate recoil. It is one out of three grenade/rocket launchers available in the storyline. It has excellent explosive damage, which is great during high rounds and it is the second most powerful grenade/rocket launcher in the storyline. This weapon has a large ammo conserve of 50 rounds in the gun when it is obtained and 500 rounds in reserve. It can only be obtained via the Mystery Box.
Effectiveness[]
The Mk. 19 is a great weapon to have, especially for high rounds. It has a one-hit kill up until Round 11, due to its extremely high explosive damage. Its full-auto firing mode and moderate recoil can make aiming down the sights difficult while firing the weapon. Firing in bursts is always recommended for the two main reasons of ammo conservation and accuracy. The main things that bring this weapon down is its long reload time and low mobility. It is recommended to buy Speed Cola to counter the long reload time and upgrading Stamin-Up is recommended as the player can then run faster with the weapon. This weapon should be pack-a-punched by Round 18.
Pack-a-Punched Variant[]
When the Mk. 19 is pack-a-punched, it becomes the Grim Reaper. After it is upgraded, its explosive damage increases from 750-1000 to 2250-2500. Its magazine size also increases to 100 rounds, which causes its reserve ammo to increase to 700 rounds. This weapon's reload time is faster by 3 seconds and it has better mobility. This weapon should be traded for a better weapon by Round 28.
Casted Shadows[]

Tripod not available in-game.
The Mk. 19 is scheduled to appear in the Casted Shadows storyline.