if your longest shot is only 75 yards go with a red dot sight with forward mounted scout scope mount. Or just stick with Iron sights you dont need magnification to 75 yards unless you are blind. But if you really dead set on a scope I wouild go with nothing bigger then a fixed 4 power scope but since now days everything is variable power get either a 3-9x32mm or 3-9x40mm then later on if you do need to take a longer shot both those scopes would be decent for long range shot