Check out the Bushnell Trophy Red dot 730131. I have an 835 that shoots only 3 1/2" shells, has been on airplanes and in trucks to South Dakota, Kansas, Wisconsin, Florida and NC for the past 10 years with no issues. I have the black 30 mm tube but they come in Realtree APG now. Great scope, durable, plenty of eye relief and won't break the bank. Once you sight them in, where you put the dot is where the shot goes. I shot a bird last year with the gun turned 90 degrees from vertical to get around some brush and the bird never moved when the gun went off. Good Luck with your selection.