it installs in a minute, I used a .223 laser bore-sight to get the first round on the paper and the adjustments on the red dot were easy and precise.
I have since dropped my gun and taken it bunny hunting several times and the 50 zero hasn't budged I can shoot a Quarter sized cluster at 50 yards EVERY TIME!!!
Pros: low profile, high quality material, holds zero through and through
This review was written in the old system and had content requirements that are different than reviews written today.