Paradigm makes a shotgun choke called the “gator” ..... a new design based on the old “duckbill” that was used in vietnam ........ works great with number 4 or 00 buck on any shotgun that is threaded for chokes. This, on a Serbu 12ga Shorty, makes a great lap gun in carjacker urban jungles.
http://www.paradigmsrp.com/gator-shotgun-spreader/
The horizontal pattern could be handy against multiple perps. I found that a rifled choke tube tends to spread 00 buck pretty good at closer distances, but of course it spreads vertically as well.
Hoe yer good