Zero Compromise Optic ZC420 4-20x50
Who tested: Rokslide field eval (2023-09) — read the original write-up, which is the source of record. Who structured it: Optics Intel. We extract outcomes and cite; the testing labor is theirs.
Sample size: 1 (single serial number, drop portion run in two ring setups) — evidence about this unit, not a verdict on every unit shipped.
Stage-by-stage record
| Tracking / RTZ | Pass | ≈0.1 mil short at 8 mils — under 2%, within live-fire resolution |
|---|---|---|
| 18″ drops | Fail | shifted zero on the 18″ right drop |
| 36″ (single) | Fail | left 36″ drop lost zero 5–6 inches left |
| 3×36″ | Shift | stabilized 0.4 mil high after the 9×36″ series |
| Long-term | Shift | ≈0.3 mil shift after 200 truck miles and a week at rest |
Mount setup
Rings/mount: ZCO rings (eval 1), Hawkins 36mm (eval 2). Ring torque: 20 in-lb. Torque caveat: the source flags mount-torque questions for this eval — weigh the results accordingly.
Notes
Failed the drop portion in two different ring setups (ZCO rings 2023, Hawkins rings 2024). Drops filmed, witnesses present.
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