You can install a rimfire mount peep sight on top on the receiver.Williams makes one #WGRS-54,along with their Foolproof #FP-GR.There's another company that makes a rimfire peep sight and I can't think of their name.that sight is around $80.00.The Browning T-Bolt had a rear peep that you can find at the gun shows or order from Western Gun Parts from canada.
