This is my version of the Halo reach DMR. It only has one feature and that is the moving slide that you can pull back and forth. it is of similar design to my sniper rifle's slide but the knob that you grab is a lot shorter. Enjoy the model and photos.
I have also included building instructions for those who want them.
A really simplistic design - you've totally got the shape going on, but I think you could add a bit more curvature to the structure of the gun. At least it looks like a DMR! Nice one.