Hybrid 80 Instructions
Here are their Instructions (PDF)
Aluminum AR-15 80% Lower
Video AR-15 80% Lower Finishing Part II (4:51)
This is another great educational video. This has good tips on how to complete an aluminum 80% lower.
How to Build an AR-15 Lower Receiver
Video How to Build an AR-15 Lower Receiver (19:01)
How to put together your lower receiver. Just like a gunsmith. With lots of tools.
How to Build an AR-15 Upper Receiver
Video How to Build an AR-15 Upper Receiver (28:55)
How to put together your upper receiver. With a little help from Midway. Not trying to sell tools or anything....