RE: 3030 scope
A Nikon Prostaff 2x7 power for around $120's, a Bushnell 3200 in 2x7 for about $225ish of a Burris Fullfield II in 2x7 for around $160.
A red dot is a small scope like device that projects an "image" or dot of some sort and color that you put on target and shoot.