Solid, quality mount - Nikon P-Series Mount 835,1 in

Bought these rings to accompany a Nikon P-308 Scope to go on my new .308 AR. I gave them four stars only because, while they're built solidly for the money, and function perfectly, they don't allow for BUIS to be installed. And they're simply too difficult to get in & off to make them practical on a tactical rifle.
That said, once installed, they are solidly mounted. Are not at all effected by recoil, or moving the rifle about - to & from the range, etc. And they will be kept for another project at another time.