heat shield mounted sights?

[made Man]

From that link to the awesomely awesome 12g ammo, found this little thing http://www.firequest.com/catalog/AD421moreinfo.html

are those any good? or is this the case of you get what you pay for?

would they even let them into Canada

 

[B]

If it's anything like the offering from ATI, utter garbage.

 

[twoshots]

I would avoid this type of set up.
ghost rings = good
heat shields= good(combat style shooting)

ghost rings on heat shields for $30 = something you will throw away or replace