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11/25/2010 1:38:42 PM EDT
What is it called and what does it do?
11/25/2010 2:30:20 PM EDT
[#1]
At a guess, its illuminated and thats to brighten the crosshairs.
11/25/2010 3:25:57 PM EDT
[#2]
Not that switch. The nub at the bottom. on the turret piece.
11/25/2010 3:29:03 PM EDT
[#3]
I think thats where the illumination bulb is, just my guess.
11/25/2010 4:20:50 PM EDT
[#4]
It's not a switch. It's a spring housing for the erector tube spring. The spring collapses into this when you dial the erector tube down for long range. While some companies (Burris, I think) have a locking mechanism in this - for most if you jack around or remove it will void the warranty or require the scope go back for service.
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