This is a beyond horrible idea, it could easily get you killed. Use it in an apparently offensive manner, i.e. point it at someone, and the shooting would even be justified, unlike at least one of the two above incidents.
+1, it's not a good idea to use a rifle form factor. A good hack, but a bad idea considering others' reactions. I'm pretty comfortable with guns (raised in more rural Idaho), and I'm not particularly keen on the idea of seeing someone point a "rifle" out their window.
Fixed it for you: http://www.huffingtonpost.com/2013/10/23/andy-lopez_n_415281..., see also e.g. http://www.storyleak.com/airsoft/
This is a beyond horrible idea, it could easily get you killed. Use it in an apparently offensive manner, i.e. point it at someone, and the shooting would even be justified, unlike at least one of the two above incidents.