Edit 2020-12-18: Ignore this, I goofed at reading comprehension.
Normally the KR4 with E21A would be shipped with the 10622 optics, yes. However, this one is clearly not frosted. Based on the LED Supply’s Quad Carclo page , the only common quad non-frosted Carclo optic is the 10621.
Someone on Reddit had mentioned that Hank may have run out of 10622 optics. I had asked Hank via email about swapping optics as well, and given what I wrote I may have accidentally opted into the 10621.
However, I picked the warmer (2700K) E21A, so tint shift isn’t an issue and I do like having a bit more throw. I’m totally satisfied with this outcome.
(Of course, I’d have to buy another optic to make sure, and I could just get another flashlight… This may be my first purchase after many months of deliberation, but it probably won’t be my last.)
You reckon that would be the best option for throw with the Carlo optics available, I’ve sent him an email to ask his suggestions anyway but it would be good to hear other ideas