Wiebad makes one that has a loop that hangs off your sling and weighs 3.6 oz. It's spendy, but it works well.
Thanks $41.60 shipped. When the wife sees the credit card hit, she will think it is cheap compared to scopes.
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway The man who makes no mistakes does not usually make anything.-- Edward John Phelps