This base gives you the opportunity to mount any scope on the 52 illiminating the need for the Unertl style scope. I have put these on 2 of my 52s and they hold tight. This base made the difference of using the 52 or leaving it in the closet. Great product, well made. On the 52 you need the neg 20 MOA base.
Pros: Fits perfect, easy installation, great for any scope
Cons: NONE
This review was written in the old system and had content requirements that are different than reviews written today.