M489 Grenade Launcher (SciFi Concept)

The M489 is a 4 shots grenade launcher. The magazine works as the barrel. To reload you pull out the barrel wich then allows the user to insert 4 new grenade shells.
It's made for the Equilibrium 308 Rifle. I didn't really like the current grenade launcher (see project).

The Equilibrium Industries Company is fictional, decals are not final.

Hope you all like it!