Rifles?????

While at the local market today I saw the Entertainment magazine with Prometheus on the cover. as I'm looking through it, I notice a photo with David leading Ford and another character(couldnt tell by distance/lighting) but, that dude looked as if he was carrying some sort of Rifle. To date, as far as I know, we've seen axes, flame units, pistols...but not a rifle type of weapon. Sorry if this is old and also for not having a scanned pic. Finally, the weaon looked to have a skeletonized, bright orange or red stock. Maybe the pre-cursor to the Pulse rifle. Just sayin