That is something you will need to verify with APF as they do not list what specific option their upper receivers are compatible with.
The profile will depend on your upper receiver.
I would recommend the low profile, but I would double check with Aero.
I would recommend contacting the manufacture of your upper receiver to know if it is high or low profile.
It should as long as the dimensions are the same as standard upper receivers.
Yes, it should fit just fine.
Yes, it should fit just fine.
The high or low profile will depend on your upper receiver.
These are steel.
I would recommend contacting the manufacture of your upper receiver to know if it is high or low profile.