BudsGunShop.com - Gun Magazine

David, unfortunatelyno. The SDS Bullpups take AR-12 style magazines and drums. You will need this drum : budsgunshop.com/product_info.php/products_id/714020477

James is correct on this one SAIGA style shotguns are AK-47 pattern shotguns, all of the SDS shotguns are AR pattern and do not have parts that are compatible across both platforms l, including magazines.
sdsimports.com/shotguns-s/430118623.htm

Yes, this will fit and function just fine in the sds bullpup. Hope this helps.