Product Options

Hello there

I have a couple of questions about possible product options.

Imagine a rifle scope and some additional mounting rings.

The scope comes with some standard rings with a standard height. As an option, the customer can buy some special lower rings. The lower rings are a separate product.

Now what I want is:
- The lower rings cannot be sold seperatly
- The lower rings should not be a must for the customer. If he wants them, he can take them, and if not, there should be a possibility to add them

If I connect these lower rings now with the scope as "Option". The user must buy them. Okay he can remove them afterwards from cart, but who know this? The most user would like to "unselect" the option.

Is there any way to do so?

Best regards
Mike