Outstanding. And I say that because I just mounted the identical scope on my 22 Mag RPR! It’s a LOT of scope for the money. I’ll have range time getting it sighted in soon. The square-ish black plastic piece is a tool to adjust stuff. You can use it to take the top turret cap off when it comes time to zero the reticle elevation . It will be interesting and fun to compare notes! 🤛🏻🔫🇺🇸