My scope's front sight utilizes a size 47 Butler Creek cover. The part I bought was a 'flexible' scope size for a 46 - 47 size. It was just too small, even after heating the cover with hot water to get it on. Flexible size in this case just didn't work. Had to got to local gun shop to buy the right size.
Pros: One cover to cover multiple scope sizes
Cons: Cover too tight
This review was written in the old system and had content requirements that are different than reviews written today.