Guh! - 3000 polies!
None of those guns look like 3000 polygons, I'm guessing theres a lot of miniscule detail that'll never be seen.
For example, never put a lot of polygons on handles, you won't see it anyway so it could just be a box.
The actual mesh construction is great, but unfortunately guns need to be low polygon, a lot of detail needs to be handled with clever texturing, and 3000 polygons is about 2000 too much.
Texturing should be the next stage, but it's quite fun to texture weapons, you really learn to love your firepower when you make them yourself - texturing is a big part of the fun when guns are concearned because there's such a massive resource of images etc online.
Van-B
Put those fiery biscuits away!