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Unfortunately Primary Arms has not provided that information, even on their own site. We recommend contacting them directly, they should be able to provide you with that information. You can reach them here: https://www.primaryarms.com/contact-us
At this time the 3x prism scopes in FDE from Primary Arms are no longer available. There may be more down the road, but you would need to ask Primary Arms if and when that would happen.
The front sight may be visible in the field of view, but it really depends on how you have the entire AR set up. The best option would likely be to mount to the carry handle if you have a carry handle on the AR as well, because the carry handle will also interfere with the field of view if you try to mount this behind it somehow.
It will match closely, but will not be exact.
Yes, it can be, but will require an adapter to be able to mount to the carry handle. It is not set up from Primary Arms to fit a carry handle specifically as it comes with a picatinny style mount.
Yes, this can be used on an AR-10 platform and the user manual has specific information for the reticle on an AR-10.
Yes, it can still definitely be used on a .308 AR, but you will need verify the hold overs for your set up.
The entire reticle is visible with or without the illumination.
No, it does not have an auto-shutoff.
This optic will be at the appropriate height to have your sights line up, but they will not line up because the optic will magnify past the front sight on an AR. This means that the front sight will be magnified while the rear sight will not be which means this optic cannot be co-witnessed at all.