Ordered from OpticsPlanet on line and received same week. Had trouble with my semi-auto 50BMG due to movement caused by scoperings. These are the most heavy duty rings I have ever found with tremendous clamping force allowing no movement. I will never need to buy another set for my BMG and will be ordering additional sets for my .308's and AR-15's. You will break a rail or bend a tube before damaging these heavy duty rings. You get what you pay for. Awesome
Pros: Easy set-up and will not move
This review was written in the old system and had content requirements that are different than reviews written today.