Holosun ARO-CORE vs EPS: Rifle Optic or Pistol Optic?

These two Holosun enclosed red dots are not interchangeable. The ARO-CORE-RD-2 is an enclosed rifle optic that mounts to a Picatinny rail. The EPS-RD-2 is an enclosed pistol optic on Holosun’s K footprint. They share a 2 MOA red dot and Shake Awake, and little else. Specs and the prices shown on Holosun’s own pages were read on November 5, 2026.

Specs side by side

• OpticARO-CORE-RD-2 (rifle)

  ARO-CORE-RD-2 (rifle)
• OpticEPS-RD-2 (pistol)

  EPS-RD-2 (pistol)

Holosun lists green and gold dot options for each (ARO-CORE-GR-2 and ARO-CORE-GD-2; EPS-GR-2 and EPS-GD-2). Holosun’s page prices are not our MSRP data and can change; we have not tracked either.

Different guns, different footprints

Holosun lists the ARO-CORE-RD-2 under Enclosed Rifle Sights, with an optic footprint of T1 / T2 and a direct Picatinny mount; it ships with 1.63 inch and 1.05 inch mounts. The EPS-RD-2 is a direct K-footprint pistol optic and ships with an RMR to K adapter plate. Neither page lists the other’s footprint, so do not plan on moving one to the other’s platform. For pistol-footprint basics, see our footprint chart.

What differs on paper

• Size and weight: the ARO-CORE body is listed at 3.38 oz and 2.48" × 1.54" × 2.63", with a 1.73 oz mount; the EPS is 1.4 oz and 1.63" × 1.19" × 0.99".
• Battery: CR2032 on the ARO-CORE, CR1620 on the EPS. Both are side-tray, and both list 50,000 hours.
• Brightness and adjustment: 10 daylight and 2 night-vision steps with 0.5 MOA clicks on the ARO-CORE; 8 daylight and 4 night-vision steps with 1.5 MOA clicks on the EPS.
• Ratings: IP67 and 1000G on the ARO-CORE; IPX8 and 5000G on the EPS.
• Lockout mode: Holosun prints Yes for the EPS and No for the ARO-CORE.

Which to pick (on paper)

• An enclosed red dot for a Picatinny-rail rifle or carbine: the ARO-CORE-RD-2.
• An enclosed red dot for a pistol with a K-footprint slide cut: the EPS-RD-2.

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

Related: EPS vs EPS Carry, SCS Carry vs EPS, 507K vs EPS Carry, ACRO P-2 vs EPS vs 509T, Aimpoint Duty RDS vs Holosun 510C, Holosun ARO vs Aimpoint Duty RDS 2 MOA, all comparisons.

Frequently asked questions

Sources

1. Holosun: ARO-CORE-RD-2 specifications
2. Holosun: EPS-RD-2 specifications

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