I have just started using Blender and it is my first attempt at modelling. So I watched some videos on YouTube and decided to have a go at modelling my own gun so this is what I came up with. I know it is extremely low poly, lacks quite a lot of detail and has a very bad texturing job but I hope you like it.
I hope to go onto making a few more advanced models with better textures.
Does it have a 3rd dimension or is it an outline of the gun with some spline maybe? I’m not sure with Blender, never used it, but look into extruding the outline a few times then you can move vertices (Individual points that form the points of polygons) around to form the trigger, sight etc
This movie might be useful though I am not good at blender.
The interesting one.
http://pimpmygun.doctornoob.com/index.php
And Alan Van Ryzin made awesome quality guns.
If you are interested in modeling, here is the website to visit: http://www.blendercookie.com/
They have great tutorials. Nice model. I know this is your first time to model a gun like that, and I assume your first texturing project for something of that caliber ;), but don’t use reference images as textures. Great job though. 
Thanks for the feedback yeah the reference image texture looks pretty bad but I hope to learn how to texture properly using photoshop. Blender Cookie has been a great help with their tutorials so hopefully I will be a professional in no time. 