Please email us at Techsales@opticsplanet.com so we can further assist you with your question.
You can mount a scope to a carry handle with the use of a carry handle picatinny mount like the NcSTAR AR Carry Handle Mount (linked below). It will fit and function as intended with an AR10 platform rifle.
https://www.opticsplanet.com/ncstar-ar-carry-handle-mount-w-picatinny-rail.html
Yes, the factory rear sight will be replaced by the Aero Precision A2 Detachable Carry Handle.
Yes, this will attach to your top Picatinny rail.
The apertures on that carry handle are mil-spec sized, and made for F marked front sight block.
This carry handle can be used with any standard height AR front sight. There are many options available from many brands. Aero Precision does make sights but we do not carry them at this time.
This is a genuine Aero Precision item.
Yes, it should. With the .308 upper receiver being longer than a 5.56, the handle will be shorter than the upper and will not stretch the full length of the receiver.
Yes they are.
This A2 Carry Handle will fit all Mil-Spec Flat Top uppers