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One pipe is sights outside profile CNC machining, placket, the middle button, after the cylinder shell, connected into a whole profile, a lot of time turning (some sights will choose a stamping), not relying on the thread splicing.
| Model | BN41240AO |
| Specification | 4 - 12x 40 AO |
| Magnification | 4 - 12 |
| Objective lens diameter (mm) | 40 |
| Field of view at 100 yds(ft) | 23.61 - 7.86 |
| Exit pupil (mm) | 10 - 3.33 |
| Eye relief (mm) | 88 - 83 |
| Click (in) 100yds | 0.25 |
| Tube Dia (mm) | 25.4 |
| Length (mm) | 359 |
| Weight (g) | 495 |
| Lens Coating | Fully Multi |
| Reticle | (Customize) |
| Reticle Texture | Optical glass |
| weather proof | Yes |
| Waterproof | Yes |
| Nitrogen filled | Yes |
| Focus system | Objective lens Focus |