The cheap quality of the product was apparent from the moment it was in my hand. When in place on the rifle,I found the bolt race level bubble to be out of alignment in its housing. I gave up and reverted to using "dead reckoning" to make sure the rifle was properly oriented.
Pros: Easy set-up,inexpensive
Cons: Cheap non-durable plastic,less than accurate
This review was written in the old system and had content requirements that are different than reviews written today.