MD Arms have just started shipping their new 20 round drum magazines for the Siaga 12 shotgun. They cost $215 (+ $3 handling fee).
It look like they have only made enough to satisfy pre-orders and are now taking pre-orders for the second batch.
… now obsolete This photo has been floating around
the internet for a while.
UPDATE: DistalRadius @ the Saiga-12 forum posted these photos. Click to expand.