Alright, received my Mesa Tactical Shell Holder from Brownell's today. Installation was pretty straight forward. The hard part was removing the Tac-Star one that was already on it! Fit and finish is excellent! The holder has a rubber piece that runs the length on the inside and holds the shells in place. All the fasteners are allen head and all supplied hardware and tools are included. I also like the fact that this holder doesn't cover up the Serial # like the other one. I have always wanted one of these, they are expensive... But, I am quite happy with it.