This receiver is dovetailed so you'd want to use the adapter below to convert to a piccatinny rail to mount a scope or Red dot.
budsgunshop.com/product_info.php/products_id/132553/ncstar+adapter+3+8+dovetail+to+picatinny+rail+black />

Hi James, yes, you need a dovetail to picatinny adapter for a scope/optic. I used this one on my Rossi >>> amazon.com/gp/product/B01ABW7GS0/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 ,
Stay safe & have a great day!

Hi James and welcome. Yes Sir. Picatinny Mount currently backordered: diproductsinc.com/Detail.aspx?PROD=1540074&CAT=3654 ------- Cheers and stay safe!