Venter - M8 'Boom Stick' 30mm Grenade Launcher

Scaling up the action of the Neostead 2000, the M8 is a dual tube-fed pump-forward 30mm grenade launcher that provides high capacity and flexible firepower (at the expense of 5.3 kg weight). 
The twin tube magazines can hold four grenades or six shotshells, and feeding can be switched between either tube or alternate between both. Common practice is to load one tube with grenades and another with shotshell or slugs, allowing the user to engage close targets in an emergency.
Reloading is accomplished by sliding forward the tube catch on top, just behind the optic rail, allowing the tubes to tilt upwards for loading from the rear.