Completed this one today after purchasing and assembling the lower. Would like to have a Colt lower but this will do for now.

Stripped Upper - RTB forged
UPK - All Colt Components
Barrel - Colt 20"
FSB - JP Clamp on (did not want to mess with the barrel)
A2 Rear - Fulton Armory National Match
A2 Hand guards - Colt
Barrel Nut / Delta Ring - Colt
A2 Flash hider - Parts bin uknown provinance
BCG = Sionics phosphate

Stripped Lower - Aero Precision (kind of a compromise, but went together well.)
LPK - Colt
Trigger - Colt
Rear End - All Colt A2 Components

The stock was a lot rougher when I initially acquired, so I sanded it and 0000 Steel wooled it to make it look nicer.

Next step to take her to the range to Zero and function test.