[Ceros]

Hey all. New guy here. I work in film and television doing various things from animation, to props, models, and makeup (I'm also about to make the jump from PB to airsoft, I just have to research a few guns before I decide where to throw my hard earned cash). Anyways... I've been hooked on the videogame KILLZONE for the PS2 for the last few months, and I want to begin fabricating a costume of the Helghast Army.

Here's my dilemma. I could spend way too much time and effort making the gun from scratch, or I could see if anyone here might suggest what combination of guns I could "kit-bash" to get the basic components and body layout, then later finesse with hand-made detailing.

Here's the weapon I'm talking about.
It's basically an assault rifle with a shotgun mounted below the main barrel.






Any ideas of what actual gun or guns this might have been based on would be really appreciated folks.

Thanks
Ceros