Holosun 507K X2 vs EPS Carry: Open vs Enclosed

Both Holosun optics are built for micro-compact pistols and list a K footprint. The HS507K-X2 is an open pistol sight with a selectable multi-reticle; the EPS-CARRY-RD-2 is an enclosed 2 MOA red dot. Every figure below is copied from Holosun’s own product pages, checked November 5, 2026.

At a glance

Which model: the 507K-X2 series page lists a red MRS version (HS507K-X2-RD, the one we compare) and a green MRS version (HE507K-X2-GR, on its own Holosun page). We read the red page only. Holosun prints a price on both pages; we list none. Window and body dimensions are printed in the order shown; Holosun does not label which number is length or width in the window figure.

Which to pick (on paper)

• If you want a selectable reticle: the 507K-X2. Holosun lists a 2 MOA dot and a 32 MOA circle that can be run together; the EPS Carry has one 2 MOA dot.
• If you want the emitter enclosed: the EPS Carry. Holosun labels it an Enclosed Pistol Sight with a fully enclosed emitter, and the 507K-X2 an Open Pistol Sight. See enclosed vs open emitter.
• If weight and footprint size matter: the 507K-X2 lists 1 oz and a 1.6″ × .98″ × .95″ body, against 1.23 oz and 1.63″ × 1.07″ × 0.95″ for the EPS Carry.
• If your slide is RMSc-cut: Holosun includes an RMSc-to-K adapter plate with the EPS Carry. The 507K-X2 page lists Direct Mount, K Footprint only.

We have not range-tested these; facts above are from Holosun’s pages.

Related: EPS vs EPS Carry, EPS Carry vs 407K X2, 507C vs 507K, RMSc micro red dots 2026, footprint chart, SCS Carry vs EPS, Vortex Defender-CCW vs 507K X2, ARO-CORE vs EPS, 407K X2 vs 507K X2, EPS Carry vs Trijicon RMR Type 2, 507K X2 vs Trijicon RMRcc, all comparisons.

Frequently asked questions

Sources

1. Holosun: HS507K-X2 specifications
2. Holosun: EPS-CARRY-RD-2 specifications

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