Originally Posted by scotto-
Plasma cutter and a Dremel. Drill press, angle grinder and a Dremel or maybe .223 with a scope, a vice and a file. What you want is a poor man's mill or a cheap arbor press.
As Brad said.......shop eBay.
Ditto: If you're just building a prototype to give to a mass production company, chain drilling and a Dremel will make slots any size you want. I wouldn't want to do hundreds this way but for just an example, keep it cheap.
A drill press and a a Dremel will suffice just fine.