NBS 30mm Bubble Level Riflescope Tubes
- 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 hunting.
- Makes it easy to maintain a perfect horizontal hold during extreme-range shooting. And matte finish, which reduce glare so that you position can be camouflaged at all times.
- Viscous fluid: No matter what circumstance, it always exists one bubble.