These are my first builds:
Top to bottom:
Oly 20" A2 HBAR upper, VM HY Tech lower(this one only required me to push to pins to complete)
CMMG M4A2 upper, Ameetec-Arms lower(started as a stripped lower, but the upper was purchased complete)
Cav Arms 14.5" upper with a Tdi 2-piece railed forend, EOTech 511, YHM BUIS, Mega lower, G27 grip(purchased the lower stripped and installed a parts kit, the upper was complete)
Now of to the left is another Ameetec lower that is awaiting an M4A3 upper, also I have an ACOG that is on its way for my future M4A3 upper.