from Murrieta, CA United States
The holo pictured is the 552, but I received the 551. In daylight, I am unable to see the red dot, the green is barely visible. The lock for the battery compartment pops up on it's own while playing and block your vision. I also came with a flip up cover for both ends of the sight, which was not pictured, but it doesn't work anyway. They covers will not stay clipped in the down position.
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