Alright, this is my first attempt at a gun (not scaled or textured of course). I didn't really base it off of anything. At this time, I'm not quite sure what type of ammunition it will use (something other than shells) Whatever it will fire, it will be very powerful, which is why there is a large shoulder rest at the butt of the gun. Tell me your thoughts/peeves/criticisms. Thanks!

It looks rather odd. Design wise, it's sort of... meh. Modeling wise, I think it's done rather well. You've got the potential to make a good design look snazzy.

My suggestions:

Grips need some sort of slant to be usable.
The front part of a rifle needs to br grabbable, I see no such thing on this model.
I don't know how realistic you want to be, but everything added to a gun SHOULD have a real usage with some sort of science or reasoning backing it up other than "It looks cooler this way." Like those things comming out of the top, the loops on the bottom, etc.

Edit: The trigger guard needs to be way longer so that the user's finger isn't snugged to close to the trigger.
The stock on your weapon is wholly bulky. The idea of a stock is to be as light as possible, as it's meant to damper the kick of a higher powered rifle, as well as offset some of the weight probably already in the gun. It's a good idea to have very spacious stocks with a low use of materials. Remember, a strip of metal is just as strong as a strip of metal with circles punched in it, making the gun lighter, the stock less powerful when slamming into your shoulder, etc. Lastly, barrels tend to only have support and nothing more. as well, they tend to align with the top horizontal strip of the gun as to keep a consistant flow of energy and kick, as well to keep the aim aligned with the sight. Currently you've got a lot of extra meat and metal supporting your barrel that's already too low and centered on your model. Raise the barrel up and lower the ammount of materials used to hold it together and you'll have a more realistic gun.

As well, shell despensers, a sliding cock, a clip release, a breaking pin, or a safety button would also give the model some more snazz, make it look more real, and give it some more angles.

In general, study real weapons. It's your best bet.

I agree, but in all its looking rather nice so far, keep it up

Alright, so based on what I've heard from people, I've made some changes. This is nowhere near done, so if you still see something off, let me know. I also added some color to make it easier to see.

I see dlft! :p It's a good start. I think that you can easily make it into to something great if you spend some time on it.

That's really good for a first attempt. Heck I didn't get there until after a_person showed off his minigun... I should say I owe him for "showing" me how to Jedit models

[/w00t I coined a word!]

Also, to make details easier to see, (though the dflt lines are actually defining some of it rather well -_- ) I suggest to render the 3d shots in Joke or Zy's 3d preview, or some other program that shades the models.

Maybe I should try making guns in radient. Anyway nice work.