As luck would have it, I recently traded for a rifle that came with a cheap LER scope that didn't belong on the receiver and I played with mounting it yesterday:
I used the widest single ring I could find to give it a little stability with only the single mounting point available:
It clears the rear sight either upright or folded, and is at the perfect height for me with the 'high' riser on the stock.
Installed where it is, it doesn't even stick out any further than the end of the stock when taken down & nested:
All told, I'm intrigued enough to see how it shoots. The scope is extremely light, and it's not like the .22LR is a recoil powerhouse -- maybe it'll work well enough as-is to run it.