Could be the recent speed of eForm approvals have people buying up accessories for their newly acquired suppresssors. I recall hearing distributor inventories are being cleaned out of suppressors.
I remember in some of the Huxwrx presentations that they mention their muzzle devices start the gases “spinning” which optimizes performance of their suppressors. I don’t know if it’s truth or marketing, but it’s something to consider when looking at muzzle devices. It’s supposedly one of the reasons the Ventum series can be less efficient than the Flow series.
You’ll notice if you look closely at the end of their flash hiders, that they are sure to not include a camera angle of in their photos, that there are no pure flash hiders, only brakes that look like one from the side.