Interesting that this is the latest tut. I was looking at automatic rifle references the other day and musing over the best way to create sharp, hi-res inset (stamping plant-style) lettering like you see in the following example:
SCAR Rifle
Booleans were a complete failure, so I guess the next line of thinking would be displacement map or bump map.
"Terminat Bora Diem, Terminal Auctor opus."