I watched a video on YouTube that demonstrated the B&T Rotex X suppressor. The most interesting thing about this suppressor is that it mounts directly to A2 flash hiders. To me, this seems way more desirable than having to buy a special muzzle attachment for each rifle that I want to use a suppressor on. Honestly, I'm surprised that I have not heard about it before now. For those who are familiar with it, are there any downsides to this suppressor attachment method? Besides B&T, are there any other suppressors that use the same attachment method?