HK21

The HK21 was an experimental Machine Gun made by the Roach Weapons Division. It was based off of the G3A3 and was a LMG (Light Machine Gun) version of the rifle.

The HK21 was never adopted into service by the Roach Military due to it's many parts, frequent jamming, and weight. Although this LMG can sometimes be seen by Roach Special Forces due to its high fire rate but this is rare.

It was able to have a standard 20 or 30 round G3A3 magazine, 100 round box magazine, or a ammo belt fed into the weapon.

The HK21 was soon adopted under the new name HK22 which fixes most of the jams, lowers the weight and is overall better.