The height of Zeiss Ultralight 1913 MS Rings you need will depend on the outside diameter of the objective lens housing on your particular scope. However, being that you are mounting it to a AR15 the 1.375" should be enough clearance for your scope.
For that set up I recommend using the Zeiss Ultralight 1913 MS Rings 36mm diameter 27mm high rings. The Zeiss Ultralight 1913 MS Rings model number is 000000-2309-918.
For that scope and rifle I recommend using the 30mm diameter 1.375in high Zeiss Ultralight 1913 MS Rings. They are model #000000-2345-660.
I would use the 30mm low (.850) Zeiss Ultralight 1913 MS Rings. You can find the base you need here:
https://www.opticsplanet.com/christensen-arms-one-piece-scope-base.html
It will depend a little on the rifle and if it has a bull barrel or not, but I would use the 30mm low (.850) Zeiss Ultralight 1913 MS Rings.
You will need the 30mm low (.850) Zeiss Ultralight 1913 MS Rings. You can find the base you need here:
https://www.opticsplanet.com/talley-picatinny-base-short-action-20-moa.html?_iv_parent-gun-make=winchester&_iv_parent-gun-model=winchester-model-70&_iv_code=9E-MT-PBSA20-PSM252702&_iv_gun-make=winchester&_iv_gun-model=winchester-model-70
I would recommend the low (.850), 30mm diameter Zeiss Ultralight 1913 MS Rings.
I recommend the 30mm high Zeiss Ultralight 1913 MS Rings.
It depends on the tube diameter of the model scope you are using. However, if it is a 30mm tube I would use the high 30mm Zeiss Ultralight 1913 MS Rings, they are the 30mm high rings.
I would recommend the 30mm high Zeiss Ultralight 1913 MS Rings.