I have used these for at least 10 years now on my bike for carrying my bow on the handlebars and they work great.I am interested in the handlebar weapon rack that is proven. I never found one that I really liked. Last year I ended up holding by bow over top front reflector.
https://www.sportsmansguide.com/product/index/mad-dog-atv-fin-grip-pro-double?a=79303
I realize they are not available on that link but i would think you should be able to find them somewhere if you search.