to answer your question, I'm sure the .22's are gone due to many of the AR platforms are chambered in .22 long rifle---at this point it seems that the lowly .22lr is an asault weapon round. The guys at Academy Sports said that all the .308, .223 and .22 ammo went right out the door with all the "black rifles"----
Here's a shot or two of the new 550 CZ American in .308---