Picatinny interface for semiauto shotguns.
Fits:
A391 Xtrema - Xtrema 2 with dovetail optical preset shotguns
A304 with dovetail optical preset shotguns
A303 with dovetail optical preset shotguns
AL391 Urika Teknys with dovetail optical preset shotguns
A400 Xplor Unico with dovetail optical preset shotguns
A400 Xplor Action with dovetail optical preset shotguns
Evolution of the previous model #C61275.
