[mcmancini]

And to underscore how a usable rifle may be constructed with readily available parts, I present a personal favorite, the AK-47 built from a receiver recycled from a shovel: http://www.northeastshooters.com/vbulletin/threads/179192-DI...

[gknoy]

I will admit that I rather wish I had the skills and knowledge necessary to do something like that. Amazing.

[ctdonath]

Easily acquired. Your new hobby awaits you.

[poopchute]

I wouldn't exactly say those are readily available parts. The guy needed all sorts of metal working tools and a kiln to melt the shovel down.

[mcmancini]

Everything he used can be found in a home workshop, especially the workshop of someone with metalworking experience. I'd guess you'd have easier time finding these tools than a home CNC mill that can handle Al.