Aero precision ar15 upper receiver - Aero Precision AR15 16in 5.56 Complete Upper Receiver with Flash Hider with Pinned FSB, M4 Handguard

Purchased a complete upper receiver without a BCG or CH at a decent price and ended up with an expensive headache. Purchased a Wilson Combat BCG and the gas tube and gas block don’t match up. Then I tried a PSA BCG and that doesn’t match up. So now I’m waiting for the Aero Precision BCG that I ordered from them to see if I can close the bolt. This is really disappointing. Will I have to bring it to a gunsmith?