This SRM 1216 12 ga semi auto is fairly new to the market.
Throws a lot of lead down range very quickly.
http://www.youtube.com/watch?v=M29ewKBjCf8&feature=player_embedded
Yeah, I’ll wait for an independent review of that one. In the meantime, there is the Saiga-12 and the MKA 1919, among others.