I have a scope and magazine extender for the varmint rifle, but I can't figure out how to connect them to the varmint rifle. I have the gun equipped in my hand, then I go to MISC in my pip-boy and click on the add-on (according to the manual), but nothing happens.

What am I missing here? Thanks in advance for the help!

Select the Varmint Rifle in the pip-boy and look in the upper right for something like "X) MOD".

Thank you!