I used the stock feed neck, then I used a low rise twist feed neck and I still had soooo much twisting and looseness with my hopper.
Shocker Vison, Halo
When I saw the q-lock it made perfect sense to me. I paid the thirty four dollars installed and have loved it ever since. I use the Halo and it does NOT move with this feed. I love it. I even installed it on my impulse. I would recommend this feed neck to all!