The Ghost Firearms 5.56 Complete Upper Receiver w/ Rifle Lower Parts Kit is not CA Compliant.
Please email us at Techsales@opticsplanet.com so we can assist you further as this can be a result of multiple different issues.
This will be slightly lighter but it will blend well with the Magpul FDE furniture.
Unfortunately the manufacturer dose not supply this information, I would recommend reaching out to them directly.
https://www.ghostrifles.com/contact-us/
Based on their website they only make M16 cut BCG's, that being said it is safe to assume yes.
They have the standard brass deflector.
The upper is assembled, as for tested no.
No, only the upper.
The barrel is made of 4150 Chrome Moly Steel Barrel with a Black Nitride finish, and will have the A2 barrel profile.
Unfortunately the manufacturer dose not supply this information, I would recommend reaching out to them directly.
https://www.ghostrifles.com/contact-us/