Designed to precisely fit Rossi R92 round barrel lever actions, includes the scope base and screws to mount a scope on a barrel. Warning - Be sure to firmly attach the base using the supplied screws. Failure to firmly install the scope mount base could cause the base to come loose during shooting and create a hazardous situation. If you are not comfortable with this mounting procedure, do not attempt to do this yourself. See a certified gunsmith or licensed dealer for assistance.