I love my Loki rings. One thing about them, I had to make a minor adjustment to my KFL bottom screw to make the contact on the ProVari with my KFL original. With my KFL-plus, for whatever reason, it was a non-issue. With my IGO-T and IGO-L, it was a non-issue. I have adjusted my KFLs so that the bottom screw is aligned with the air intake hole on the side, and that could be part of the reason I had to adjust again, but be aware of this. The Loki rings are thicker (no gap, fits snug) which I like and am happy to make the adjustment for the tight fit.
I like them better than the Tatroe Rings. Well worth the extra five bucks. Here they are, two brushed stainless and one black delrin. I also ordered the black 9mm hollow point bullet drip tip, pictured here on the IGO-T.