The ScopLEVEL attaches to standard 1 inch scope tubes and folds down out of the way when you're not using it. When you flip it up, you can actually see the bubble in the level when you're lining up your shot in the scope eyepiece. See our Riflescope Accessories Page.
; "ScopLEVEL Anti-Cant Unit - Level for Riflescopes")
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