# Arken EP5 5-25x56 vs Primary Arms GLx 4-16x50 FFP: specs and price compared

A sourced, side-by-side comparison of the Arken EP5 5-25x56 (Arken) and Primary Arms GLx 4-16x50 FFP (Primary Arms) among rifle scopes. Arken EP5 5-25x56 is the cheaper of the two at $499.98.

## Side by side

| Spec | Arken EP5 5-25x56 | Primary Arms GLx 4-16x50 FFP |
| --- | --- | --- |
| US price | $499.98 | $699.99 |
| Brand | Arken | Primary Arms |
| Magnification range | 5-25x | 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 MRAD | 0.1 MIL |
| Field of view (ft) | 25.3 | — |
| Eye relief (in) | 3.4 | 3.5 |
| Parallax type | side-focus | side-focus |
| Length (in) | 14 | 13.8 |
| Weight (oz) | 39.2 | 23.5 |

## Key differences

- Magnification range: Arken EP5 5-25x56 5-25x vs Primary Arms GLx 4-16x50 FFP 4-16x
- Objective diameter (mm): Arken EP5 5-25x56 56 vs Primary Arms GLx 4-16x50 FFP 50
- Tube diameter (mm): Arken EP5 5-25x56 34 vs Primary Arms GLx 4-16x50 FFP 30
- Click value: Arken EP5 5-25x56 0.1 MRAD vs Primary Arms GLx 4-16x50 FFP 0.1 MIL
- Eye relief (in): Arken EP5 5-25x56 3.4 vs Primary Arms GLx 4-16x50 FFP 3.5
- Length (in): Arken EP5 5-25x56 14 vs Primary Arms GLx 4-16x50 FFP 13.8
- Weight (oz): Arken EP5 5-25x56 39.2 vs Primary Arms GLx 4-16x50 FFP 23.5

## Sources

- Arken EP5 5-25x56: https://www.arkenopticsusa.com/products/ep-5-5-25x56-ffp-illuminated-vpr-zero-stop-34mm-tube (arkenopticsusa.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/arken-ep5-5-25x56-vs-primary-arms-glx-4-16x50-ffp/
Cite: Per The Front Desk Review, Arken EP5 5-25x56 ($499.98) vs Primary Arms GLx 4-16x50 FFP ($699.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/rifle-scopes/arken-ep5-5-25x56-vs-primary-arms-glx-4-16x50-ffp/
License: CC BY 4.0.