Yeah, I see that now. Just enough to get over the fiber and stainless mating, I guess. I remember on another post you mentioning how the follower could hang-up right at that crucial point -- the last shell in the tube I'd imagine.
Briley states that the follower was designed for 3-Gun where deep and aggressive loading port reduction (see their pictures) can remove a portion of the mag tube fitment to the receiver, thus allowing a much shorter follower to cant off the axis of the mag tube as the follower is not fulling supported 360 degrees after the last shell is expended from the mag tube. A longer follower keeps things aligned. That made sense to me as it seems like a short (OEM) follower might jam a little bit if its canted in the mag tube during speed re-loads.
Then again, call me Rosanna, Rosanna, Danna!