Butler Creek flip up for Nightforce ATACR 4-16x50 eyepiece?

[KyleC]

I bought a #19 which Google said was the right one. I'll be damned if I can get it on there. Pretty much ruined it trying. Any help?

 

[The Oregonian]

It should have a tanabrex cover with it. I haven't used BC in years but I am very happy with the tanabrex scope covers.

 

[KyleC]

My bolt drags on the outside ring ring on the Nightforce scope covers.