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Easily measure rough dimensions of firearm and/or components with standard ruler printed on bottom and left edges or metric ruler on top and right edges
Fits: HD 4-16x44 FFP
Guide Type: Bubble Level
Color: Black
Waterproof
Discovery Optics Bubble Level For 1-inch & 30mm Scope Tubes Color:1 Inch Easily measure rough dimensions ofGuide Length: 10" 25cm Model Number: BL001 Guide Type: Bubble Level The thickness of bottom is only 2mm(for 30mm and 34mm) or 4. 4mm(for 25. 4mm) so it will fit most rail system and do not need to worry about your low profile scope rings. It's full CNC machined with T6061 but not using the aluminum alloy sections. It is easy to install and to mount anywhere on scope tube left or right side, the ring is so light to carry and cannot block you view of
