My cousin and I were kicking around the idea while we were making knives the other day to try casting 80% lowers using scrap aluminum and his forge. I did a little reading on some other (much less helpful) forums that seamed to think that only a professional in a million dollar shop could cast anything but fishing sinkers. I think it could be done, but the process is the problem. Lost wax casting strikes me as the best option, but there are inherent problems with complex casts that way. The goal is to churn out a few boxes of 10 and 15 lowers to sell at the local gun show for about 30 bucks a pop. Sence lowers are not exposed to high pressure I figured that any grade of aluminum would work well enough to be used for a decent amount of time before they break. What do you guys think? Can it be done, would it be worth while, is it ethical to sell cheap parts that someone could need to rely on in a time of crisis?