Holosun EPS Carry vs 407K X2: Window, Size and K Footprint

Both Holosun models list a K footprint, so they target the same class of micro-compact slides. The EPS Carry is an enclosed emitter with an RMSc-to-K adapter included; the 407K X2 is an open emitter with a 6 MOA dot. Every figure below is from Holosun’s product pages, checked November 4, 2026.

At a glance

• OpticEPS Carry RD-2

  EPS Carry RD-2
• OpticHS407K-X2

  HS407K-X2

Which to pick (on paper)

• If you want an enclosed emitter on a K-cut slide: the EPS Carry. Holosun also includes an RMSc-to-K adapter plate.
• If you want the lighter open emitter: the 407K X2 at 1 oz vs 1.23 oz for the EPS Carry (both Holosun body weights).
• If your slide is RMSc-only and you still want EPS Carry: Holosun ships an RMSc-to-K adapter with the EPS Carry.

We have not range-tested these; facts below are from the makers.

Related: EPS vs EPS Carry, 507C vs 507K, RMSc micro red dots 2026, footprint chart, enclosed vs open emitter, EPS Carry vs Trijicon RMR Type 2, Holosun EPS Carry vs Trijicon RMRcc, all comparisons., 507K X2 vs EPS Carry

Frequently asked questions

Sources

1. Holosun: EPS Carry RD-2 specifications
2. Holosun: HS407K-X2 specifications

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