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Holosun 407K X2 vs 507K X2: Single Dot vs Multi-Reticle

By Cole Harlan, EditorUpdated Nov 5, 2026How we verifyEditorial standards

The biggest printed difference is the reticle: Holosun lists the HS407K-X2 with a single 6 MOA dot and no selectable reticle, and the HS507K-X2 with its Multi-Reticle System (a 2 MOA dot and a 32 MOA circle, selectable). The window, body size, weight, battery and K footprint are printed identically. Every figure below is copied from Holosun’s own product pages, checked November 5, 2026.

At a glance

Spec (maker label)	HS407K-X2	HS507K-X2
Reticle	6 MOA Dot	2 MOA Dot & 32 MOA Circle
Selectable reticle	No	Yes (2 MOA dot, 32 MOA circle, or combined circle dot)
Window size	.58″ × 0.77″	0.58″ × 0.77″
Body dimensions	1.6″ × .98″ × .95″	1.6″ × .98″ × .95″
Body weight	1 oz	1 oz
Battery	CR1632, side tray	CR1632, side tray
Battery life	50,000 hours (setting 6)	50,000 hours
Brightness settings	10 daylight & 2 night vision	10 day & 2 night vision
Footprint (maker wording)	Direct Mount Holosun K Footprint	Direct Mount K Footprint
Shake Awake / Lockout mode	Yes / Yes	Yes / Yes
Solar power	No	No
Housing and water rating	7075-T6 aluminum, IP67	7075-T6 aluminum, IP67
Source (checked Nov. 5, 2026)	holosun.com HS407K-X2	holosun.com HS507K-X2

Holosun’s HS407K-X2 page title says “Micro 2 MOA Red Dot,” but the same page’s features and optical data list a 6 MOA dot; we show the 6 MOA figure from the specifications. Holosun words the battery-life line differently (“Battery Life (Setting 6)” on the 407K, “Battery Life” on the 507K), so the two 50,000-hour figures may not be stated at the same setting. Both pages list a price; we do not, because street prices move.

Which to pick (on paper)

If you want one fixed, larger dot: the 407K X2. Holosun lists a 6 MOA dot and Selectable Reticle: No.
If you want a choice of reticle: the 507K X2. Holosun lists its Multi-Reticle System: a 2 MOA dot, a 32 MOA circle, or both together.
If footprint, size and weight are the deciding numbers: they are printed identically (K footprint, 1.6″ × .98″ × .95″, 1 oz), so they do not separate these two.

We have not range-tested these; facts above are from the makers’ pages.

Frequently asked questions

What is the difference between the Holosun 407K X2 and 507K X2?

Holosun lists the HS407K-X2 with a 6 MOA dot (Selectable Reticle: No) and the HS507K-X2 with a 2 MOA dot and 32 MOA circle (Selectable Reticle: Yes). Window, body size, weight, battery and K footprint are printed the same.

Do the 407K X2 and 507K X2 use the same footprint?

Holosun lists the 407K X2 as Direct Mount Holosun K Footprint and the 507K X2 as Direct Mount K Footprint.

What battery do the 407K X2 and 507K X2 use?

Both use a CR1632 in a side tray, with up to 50,000 hours listed by Holosun.

Holosun 407K X2 vs 507K X2: Single Dot vs Multi-Reticle

At a glance

Which to pick (on paper)

Frequently asked questions

Sources

Keep exploring

At a glance

Which to pick (on paper)

Frequently asked questions

Sources

Keep exploring

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