My police department bought about 45 new AR’s and mounted new Eotech’s on them about 3 years ago, they were zeroed. Now they all hit 5 inches to the left. Puzzling. Personally I declined the issued AR and kept my iron sighted 16” barrel Colt. The dept. bought the short stubby 10 inch barrels.
Anybody have any experience with this? I don’t know if it is due to the roof mount where the rifles have been laying on their sides while the patrol cars have been bumping down the roads lights and sirens for 3 years.