So Tokyo Marui have run their latest live stream and run some new annoucements. Included in their stream (now viewable on their Youtube channel) is news of the White Storm AEG which appears to be a rework of their recoil Storm AK (with M-LOK goodness), and the… Saiga-12k GBB shotgun.
From what I see in the promo material the Saiga appears to have a 18 shot magazine capacity (54BBs total in 3 shot bursts). I’ve not caught a release date yet, but my translation skills are weak.