Flip cartridge inkjet

How to mount a magnifier with red dot scope? - magnifier for bushnell red dot

I think it's a magnifying glass to go before or after a red dot scope?

What are my chances in this work
http://www.opticsplanet.net/bushnell-tro ...
http://www.cheaperthandirt.com/SCP411-7. ...

Any advice would be appreciated?

SGL20 rifle is a Saiga
I have a rail mounted on the scope of the work, I hope you have enough space
http://www.cheaperthandirt.com/AKS006-6. ...

Ideas?