It's expensive but it does work better than stock and it it works better with a low scope - Geissele Super Charging Handle

I have a Nikon Pro staff 3x9 on my AR and there isn't much room with medium height rings. This allows me to pull the charging handle back from either side and gives me more area to grip. It's smoother than stock too. Just not sure these two things couldn't have been done cheaper by purchasing a different handle but I am happy with my purchase. It was the best price I could find on the charging handle anywhere.