the only way to get 1/2 moa adjustment elevation on the nm sight is with a hooded nm aperture. the gearing teeth are cut for 1 moa, same as a regular sight. you can insert a nm aperture into a regular base, the difference is an nm base has a cut out for the hood. the hood on a regular base will bottom out too high. the other base difference is the windage for nm is finer thread for 1/2 moa. so you must use a nm windage knob in only an nm base.windage threads get striped with the wrong pinion for the base. whether this base has a cut out for the hood and 1/2 moa windage knob, I can,t tell from the angle of the photo. more pictures would help.