Setup was easy, but will not stay in place. Even with locktite, the screws get loose. Difficult to zero in and lock down. Stated that it enabled you to still use iron sites. The way it sits, it won't line up well enough. Hated it.
Pros: quality machining
Cons: no information on allen size, fragile set screws, loosens even with locktite.
This review was written in the old system and had content requirements that are different than reviews written today.