Just finished two new builds that I have been accumulating parts for. The first is an M16A2, FN copy. The upper end is built from an FN receiver, FN (cage code) barrel, FN Bolt with an Ice Carrier, and GI charging handle all complements of the EE. The hand guards were a pay- it- forward item and stock assembly is of unknown origin but also off the EE. Lower receiver is a Matrix Aerospace with PTAC parts kit. A point of interest is that I have used several of the PTAC parts kits and have found them to be just as good and provide just as nice a trigger as the PSA kits.
The mid-length is A2" inspired" and I refer to it as Mini Me. It is a PSA CHF A3 complete upper end with GI carry handle. Lower Receiver is PSA with a PSA parts kit. This is where I diverge a bit because the stock assembly is A1 off the EE; carry handle is also off the EE.
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I haven't got either one to the range yet but now that it has stopped raining in East Texas I may get a chance.