http://www.specializedarmament.com/pages/2011_schedule.htmlI am finishing an AR-15 armorer's school with Ken Elmore. Ken is an encyclopedia of knowledge and a very good instructor.
Ken brings a wide variety of AR-15/M-16 firearms that the student can disassemble and reassemble. The advanced class covers function issues beyond simple disassembly and reassembly.
I highly recommend both schools he offers, the basic one and the advanced one.