S&W .300 BLK Rock River .223/5.56 (Wylde chamber) Aero build .308 Win And no idea why. Don't shoot them because I hate chasing brass. Don't like the ergonomics (much prefer a svelte bolt or lever gun). Bought them in part because I could and was (and still am) concerned that they might become more restricted or even prohibited. Voted with my pocket book. Anyone else in the same boat?