Scope numbers look complicated.
They are not, once you know what each one means.
| 3-9×40 | Magnifies 3 to 9 times, 40 mm objective lens |
|---|---|
| Objective lens | Bigger gathers more light, adds weight |
| Tube size | 1 inch, 30 mm or 34 mm main tube |
| MOA | About 1 inch at 100 yards per click group |
| MIL | 10 cm at 100 meters per mil |
| First focal plane | Reticle grows with magnification |
| Second focal plane | Reticle stays the same size |
Match the turret units to the reticle: MOA with MOA or MIL with MIL.