I just tapped my receiver and added a Picatinny Rail that I could mount red dot site. May change to scope later but have not used Red dot yet.

1/8th drill bit and bottom must tap used. Then finished up with some lock-tite.
(Make sure NOT to drill thru receiver and only drill barely thru the first layer of metal, )

Looks good nice addition

I went straight through all the layers and made sure to give it some oil to prevent any rust starting from between the layers. No problems for 2 years