I love it, but you might not - 2A Armament 8 Position Billet Buffer Tube

Let me explain, there are two things that make me love this buffer tube, the first is that it has a perfectly placed position 1 that allows me to get my B5 sopmod right up to the castle nut without any gap like most guns have. The second is that it is the only tube that has an extremely tight (no wobble) fit with the sopmod as well. HOWEVER, this comes at a price as it is hard to adjust from position to position. This doesn't matter to me at all because I always pick a position for my stocks and set it and forget it.