If you're looking for an inexpensive scope for your Model 24, take a look at the Bushnell Banner 4x20. I have one on a 24 in 22Mag/410 and since it has a 20mm objective, it looks "right" to me.

This is a 1" tube scope, so mine is installed with B-Square rings and B-Square 3/8" groove to Weaver adapters. If you go with this, you'll probably need a hammer spur too.

Can you post a picture of that scope mount system on your 24?

I don't do pictures.