Works great - Aimpoint PRO/ACO/9000 Lens Covers

The newer Aimpoint design is superior to the older Butler Creek design because the open lens covers lay flatter and do not stick straight up. The rear cover installs very easily on the older model CompM as opposed to being a tighter fit on the newer models.
Pros: Improved design
Cons: None

This review was written in the old system and had content requirements that are different than reviews written today.