Thanks. I design things, but am not an Engineer - and my degrees are both in Science. In the early days I made my own samples but now that I work at AAC I work with Engineers, Machinists, and Draftsman. Back when I designed my silencer I made the first ones (I have machine tools and weld, took classes for both at the local college to learn and read books). That silencer was recently adopted by the US Army for the XM-2010 sniper rifle.
http://www.google.com/patents?id=8nL...page&q&f=false
http://en.wikipedia.org/wiki/XM2010_...d_Sniper_Rifle