Quoted By:
Some of the many guns from the old Doom movie adaption. I don't remember it being particularly good, but the first person shooter scene is kind of neat, and the guns look cool enough. I think a good adaption of Doom is doable, inherently you need to take some liberties and divert or invent some things, it's just that the two adaptions which exist mostly did that wrong.
The assault rifles for the movie were largely built on H&K G36 rifles, with various sci-fi embellishments. Many of them feature what appear to be some sort of grenade launcher, one which is fed from a magazine even, but I don't recall if any of them were ever fired. If you look at one of them, it appears to have some sort of protective cage over the pistolgrip (almost like a basket hilted sword?), not sure there was any rationale there besides aesthetics. The rifle in the third row I think was barely used in the movie at all, it was left over or something and mainly stayed in the background, and you also have a subgun (built on a H&K MP5K).
A lot of the shells for these have showed up on auction sites over the years, not so easy to get the actual blank converted assault rifles, the armorers probably still have those, but the outer shell parts and either demilled G36 rifles, or airsoft ones, with these parts fitted. Then you have some of the stunt castings, made from rubber and "biscuit foam," with metal wire armatures to make them retain their shape, and painted on the outside to match the firing guns, so that you can do stunts with the weapons and not risk that someone gets impaled or breaks some bone. Or when they don't need to shoot or be close to the camera, so the actors can carry less heavy props.
The stunt castings appear the most common (they're cheap and flimsy, so you make a bunch of them), the subgun here is one of those, but you can find examples of the others. One of them has the entire magazine broken off, and you can see the yellow foam insides there, but it's not in this collage.