A friend forward this to me as I don't have Facebook.
Just released on their Facebook page, not even on their website yet.
(Text from the Facebook page)
Black Aces Tactical is very proud to present to the public what we've been working on in secret for months. What you see before you is our Pro Series receiver retrofit kit rapid prototype. Our machined prototypes are due by mid December.
These retrofit kits allow the average shotgun operator to replace their old oem receiver with our kit, and now be fed by Saiga 12 magazines! That's right! You'll be able to run 8, 10, and 12