Black ace tactical states on their website that Saiga mags fit their 12 gauge shot guns, BUT does not say which brands fit it. Came to find out that after buying magazine4s that fit the saiga that they don't fit the BAT M pump shot gun. Finally, got them to respond after emailing them through pissed off customer that the SDS brand is the only one that fits besides the magazines they make, but no longer sell through their website. User's recommendation: Black Aces Tactical is not a company to buy from.