As Dave said, the SixG nub isn’t ideal for long contact patch, concave buckings. It works, but you’re not going to get the benefit of the bucking. A standard bucking or a modify tan uses a normal mound style hop, so it’s idea with the SixG nub. I’ve used that in a previous DMR setup and was able to hop .40’s no issues.
If you want to use long contact patch buckings like the TNT I’d advise a barrel with a longer window as the mound can hit the front of the barrel window. I’d also suggest opening up the chamber where the nub sits and running a longer nub.