Look a couple posts up. It's just a rail system made by black aces. All the other things are singular addons.
Unless I read an old article, black aces makes the only rail mounting system for these tactical mossbergs. The tube extension, stock, and sights/lights are all separate. I already have a red dot sight and a flashlight mount I can put on it back home. Just waiting on the tube extension for it and I'll be able to assemble the damn thing.
After that, the only thing I'll need is the pistol grip stock. I'll probably have to wait until fathers day for it bc I've been spending top much on weapons lately.