March FX 4.5-28x52
Who tested: Rokslide field eval (2023-11) — 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, owner-supplied) — evidence about this unit, not a verdict on every unit shipped.
Stage-by-stage record
| Tracking / RTZ | Pass | RTZ fine; 7.8 mils measured between dots |
|---|---|---|
| 18″ drops | Pass | — |
| 36″ (single) | Pass | — |
| 3×36″ | Pass | — |
| Long-term | Fail | sent for warranty after consistently losing zero — random elevation shifts in two ring sets |
Mount setup
Rings/mount: owner-supplied ARC; different rings during long-term use. Ring torque: not stated in source. No torque caveat flagged in the source.
Notes
Drops passed; the failure was recurring ±0.2–0.3 mil random vertical shifts unrelated to impacts. Source also documents a milky outer field-of-view ring.
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