As of 2019, of December, Contagion now ships with a folder called "contagion_sdk", which contains all view model source files (SMD) to compile for Contagion.

Before we begin, you will need 2 programs, a modeling software and Crowbar. And make sure that modeling software have support for .SMD or if it got 3rd party support for it.

For this guide, I am using FragMOTION[www.fragmosoft.com], so don't be alarmed if everything is not the same.

• Understanding of basic animation
  
• Understanding of your own modeling software
  
• Understanding of VPK's

With Crowbar, you can decompile the Contagion models easily, but you need to setup the compiler for Contagion. Here is an image how it might/should look like:

Now, for example, lets decompile v_ar15, or v_sig, now if you check on its folder, you should see a folder called decompile

Now lets head to the folder and open up the .qc file, here we will see a fully-ish working QC file, but there is a problem. If you re-compile the weapon with the QC, it will act strangely, and not work properly. And here is the way to fix it, which you should do to all weapons you decompile. Find $sequence "ironsight" and then make sure it looks something like this:
But we are not done yet with the QC, we still need to fix another row. Now lets find $animation "a_ironsight" and make sure the subtract "a_idle_pose" 0 is not commented out.

And now comes the hard part, fixing the animations.

2 animations will always be broken, which is the delta, and the ironsight. sometimes it might be 3, which is the "out of ammo" animation. But the fix is very simple. You open a_idle animation and a_idle_delta, and override the delta with a_idle and call it a_idle_delta_new to make sure you don't screw things up. then on the QC, makes sure it reads like this after you have done the first fix.

But now comes the tricky part, the ironsight. But lets do the QC part first, lets do the same thing we did with delta, but here we also add subtract "a_idle_pose" 0, because else the delta will flip out.

You can notice I made a_idle_aim, because its basically an "aim" animation. Make sure you look from 0, 0, 0 (X,Y,Z). and place the animation so the sights go right trough 0, 0, 0

This is experimental, so its up to you to fix that part yourself. But from this point, you can compile and test your weapon in-game w/o any issues.