two things; get an air rifle rated scope, they are usually cheapest; don't know why- they can take more recoil....secondly your scopering bases, should either be double wide, with 2 screws going through the bottom, so they have extra wide bite on the rail, or you need to get kwik site, tip off blocks. they look like little leggo pieces, and when you put these on first, they are super stable, then you can attach any bases you want, to these blocks, they will make your scope sit up real high though.
Lastly , going to optics planet as mentioned above, this is the best scope made, for under 50 bucks; it is the best scope made for under 100 bucks, really.
it is break bbl rated, spring piston rated adult air rifle rated. and comes with rings and mounts allready, but the mounts as you can see, are only 1 screw wide. Marlin are famous for ' scope walking' which is why I say to look for 2 screw wide bases, or get the kwik site blocks.
http://www.opticsplanet.net/tasco-3-9x44-titan.html
sometimes the big box stores, have the above scope allready, in a hard plastic blister pack, with ear muffs and glasses, the deal of the century. so look at academies, gander mtn, bass pro, wallyworld, etc., in your area. You might get lucky. If not, then get something that is air rifle rated, spring piston rated, break bbl rated, if you can find it. at the very least, spring piston rated. those little, tiny, pencil type scopes will not make you happy.
