Ok, after more investigation, the scope is a Tasco 6x24x42 and it was a factory option.

It's a mil-dot scope from what I could find.

James Pepper: There's no law west of Dodge and no God west of the Pecos. Right, Mr. Chisum? John Chisum: Wrong, Mr. Pepper. Because no matter where people go, sooner or later there's the law. And sooner or later they find God's already been there.