Mass Effect 3 can't come out soon enough! I really liked the M5 Phalanx pistol from the ME2 DLC and originally wanted to make a prop of that, but when I saw that there would be a DLC with more weapons for ME3, I decided I needed to make one of those instead! I ended up picking the N7 pistol because it is very similar to the M5 Phalanx. There was one image of it online, so I am using that for reference.
I used that image to come up with a vector, printed it out and got to work!
I'm building this gun similar to my Battlestar Galactica Colonial Handgun. I have a lot of foam PVC lying around from previous builds, so I mostly am using layers of that epoxied together.
So far Things are going pretty well, though I had a tough time judging how thick the gun should be. I am using references of the 3D model of the M5 to sleuth it out, but I've had to make some adjustments.
I'm building the gun in pieces so that the cast parts will have to be assembled. I figure that this way I will have an easier time of adding moving parts or electronics if necessary. Also, this will allow for the gun to be modded to the M5 pretty easily.