# Athlon Ares ETR 4.5-30x56 vs Primary Arms GLx 4-16x50 FFP: specs and price compared

A sourced, side-by-side comparison of the Athlon Ares ETR 4.5-30x56 (Athlon) and Primary Arms GLx 4-16x50 FFP (Primary Arms) among rifle scopes. Primary Arms GLx 4-16x50 FFP is the cheaper of the two at $699.99.

## Side by side

| Spec | Athlon Ares ETR 4.5-30x56 | Primary Arms GLx 4-16x50 FFP |
| --- | --- | --- |
| US price | $1437.49 | $699.99 |
| Brand | Athlon | Primary Arms |
| Magnification range | 4.5-30x | 4-16x |
| Objective diameter (mm) | 56 | 50 |
| Tube diameter (mm) | 34 | 30 |
| Focal plane | FFP | FFP |
| Reticle illuminated | Yes | Yes |
| Elevation travel mil | 32 | — |
| Click value | 0.1 MIL | 0.1 MIL |
| Field of view (ft) | 24.5 | — |
| Eye relief (in) | 3.9 | 3.5 |
| Parallax type | — | side-focus |
| Length (in) | 15.3 | 13.8 |
| Weight (oz) | 36.5 | 23.5 |

## Key differences

- Magnification range: Athlon Ares ETR 4.5-30x56 4.5-30x vs Primary Arms GLx 4-16x50 FFP 4-16x
- Objective diameter (mm): Athlon Ares ETR 4.5-30x56 56 vs Primary Arms GLx 4-16x50 FFP 50
- Tube diameter (mm): Athlon Ares ETR 4.5-30x56 34 vs Primary Arms GLx 4-16x50 FFP 30
- Eye relief (in): Athlon Ares ETR 4.5-30x56 3.9 vs Primary Arms GLx 4-16x50 FFP 3.5
- Length (in): Athlon Ares ETR 4.5-30x56 15.3 vs Primary Arms GLx 4-16x50 FFP 13.8
- Weight (oz): Athlon Ares ETR 4.5-30x56 36.5 vs Primary Arms GLx 4-16x50 FFP 23.5

## Sources

- Athlon Ares ETR 4.5-30x56: https://athlonoptics.com/product/ares-etr-uhd-4-5-30x56-aprs1-ffp-ir-mil/ (athlonoptics.com, verified 2026-07-11)
- Primary Arms GLx 4-16x50 FFP: https://primaryarmsoptics.com/optics/rifle-scopes/medium-range-scopes/primary-arms-glx-4-16x50-ffp-rifle-scope/ (primaryarmsoptics.com, verified 2026-07-11)

Canonical: https://frontdeskreview.com/gear/rifle-scopes/athlon-ares-etr-4-5-30x56-vs-primary-arms-glx-4-16x50-ffp/
Cite: Per The Front Desk Review, Athlon Ares ETR 4.5-30x56 ($1437.49) vs Primary Arms GLx 4-16x50 FFP ($699.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/rifle-scopes/athlon-ares-etr-4-5-30x56-vs-primary-arms-glx-4-16x50-ffp/
License: CC BY 4.0.