Looking for a lite weight (under 16oz) 1 inch tube variable scope with at least 12x for my new AR15. Weight or more precisely the absence of it is important as it will be a should gun and cannot lift a heavy gun repeatedly. Also important is a side focus or AO as I will be shooting mostly indoors (25yds) and some out doors. I am very. old losing eye sight and need good glass . I find the AO or side focus makes a huge difference. I have been looking at the Leupold sku 115392. It is about 355 on ebay. I have a new Leupold 3x9x33 efr on my Henry lever gun and live it very much. I would love to have an illuminated reticle but the ones that I have found weigh too much. I would appreciate any recommendations. I am pissed off about getting old-it is not for sissies.