Installed rail on my Remington 870 Police. The Mesa Tactical Shotgun Receiver Mount Picatinny Rail is a 1-piece component which gives you the ability to mount red dot or optic sight on your shotgun. Also, there ghost ring sights that can be installed to help with your aim and accuracy as a shooter. The model number of this Picatinny rail is MIL-STD 1913 and it is recommended for use with three major shotgun brands: Mossberg, Benelli, and Remington.