AR15 - Repaired, Modified, and Split

Ok... the original model is a beautiful work of art. There are, however, several issues with it. After no replies from the designer, I took it upon myself to repair the model and modify it for my own needs and to suit my own tastes.

**Changes/Repairs Made:**
* Repaired numerous non-manifold errors throughout the STLs.
* Renamed STLs to reflect more correct nomenclature.
* Removed the handle from the bottom of the rail.
* Removed the protrusion from the bottom of the magazine.
* Combined the two stock parts into one piece.
* Thinned the trigger down for a better fit.
* Increased the thickness of lower trigger guard a little bit.
* Resized the inner hole of the rail for a better fit to the barrel.
* Split the barrel and the body in to multiple pieces to allow for printing on 200mm printers.
* Included pins to allow for exact alignment of components.

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You will noticed that I have included the original STL for the scope, even though that was not printed (and therefor