As with pin selection, mounting options are a personal preference. You should know that dovetail and Picatinny-style mounts drive the price of a sight up.  A standard mount includes a sight body and an all-in-one bracket system that attaches to the side of the riser via a pair of set screws. A dovetail mount consists of a mounting bar that slides through a mounting bracket, allowing the user to move the sight housing closer to or further from the riser. A very new-to-the-industry Picatinny mount uses a clamp that mounts to a Picatinny-like design integrated into the face of the riser.