If these are for third person, 2048 is way too big and even 1024 is a stretch. Your polygon counts are also very high for third person. The diffuse textures seem a bit too... textured. The Thompson receiver looks like stone, and the 1911 looks like marble.
Thanks, that's a really big help. The triangle counts were born pretty much out of ignorance. I looked at the UT3 models, and the third-person models are between 1.5 and 3k, so I'll aim for that. I'll drop the resolutions down to 1024 for everything. I'll see how it looks at 512, but I'm concerned that I won't be able to…