Head to head

Trijicon RMR HD vs Holosun HS507C X2

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

Two open red dots that share the RMR footprint. The biggest cited difference: Trijicon prints 1.69 oz and a CR2032 top-load battery; Holosun prints 1.5 oz and a CR1632 in a side tray. Trijicon’s page prints no window size, so that row is left unfilled. Checked November 5, 2026.

At a glance

Spec (maker label)	Trijicon RMR HD (RMHD1 / RMHD2)	Holosun HS507C X2
Reticle	1.0 MOA (RMHD1) or 3.25 MOA (RMHD2) center dot with 55 MOA selectable segmented circle	2 MOA Dot & 32 MOA Circle (MRS selectable)
Window	Not yet verified (no window width and height printed)	0.91″ x 0.63″
Body size	2.15 in x 1.27 in x 1.19 in (length x width x height)	1.78″ x 1.15″ x 1.15″
Weight	1.69 oz (47.91 g)	1.5 oz
Battery	Top-loading CR2032	CR1632, side tray
Battery life	Over 3 years continuous at brightness setting 5, dot only (product page)	50,000 Hours
Brightness	9 settings, 3 night vision, 1 super bright; auto, lock-out and lock-in modes	10 Daylight and 2 NV
Water rating	Submersion to 65 ft (20 m) (product page)	IP67
Housing	7075-T6 forged aluminum	Not yet verified
Footprint	Same footprint as RMR	RMR Footprint
Source (checked Nov. 5, 2026)	trijicon.com RMR HD	holosun.com HS507C X2

The makers do not measure alike. Trijicon’s RMR HD sheet (PML4090, which we read but do not link because we have no stable URL for it) says waterproof up to 66 ft / 20 m while its product page says 65 ft (20 m); the table uses the page and neither is directly comparable with Holosun’s IP67 rating, which is a different kind of label. The sheet also says battery life up to four years, against the page’s “over 3 years” at one setting. Holosun’s page also lists solar power and Shake Awake; we have not compared those with Trijicon. Brightness counts are labeled differently (Trijicon: 9 plus 3 NV plus 1 super bright; Holosun: 10 daylight plus 2 NV).

Which to pick (on paper)

If you want the lighter printed weight: the Holosun at 1.5 oz against Trijicon’s 1.69 oz.
If you want the larger printed battery life: the Holosun lists 50,000 hours; Trijicon lists over 3 years of continuous use at setting 5 (dot only), and the labels differ.
If you want a window size printed: the Holosun lists 0.91″ x 0.63″; Trijicon’s page prints no window size.
If you want the same mounting: both list the RMR footprint, so the optic plate pattern is the same on paper. Check your slide cut with the pistol maker.

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

Frequently asked questions

Do the RMR HD and the HS507C X2 share a footprint?

Trijicon lists the RMR HD as the same footprint as the RMR, and Holosun lists the HS507C X2 with an RMR footprint.

What battery does each use?

Trijicon lists a top-loading CR2032. Holosun lists a CR1632 in a side tray.

What window size does the RMR HD have?

Trijicon's product page does not print a window width and height, so we list it as Not yet verified.

Trijicon RMR HD vs Holosun HS507C X2

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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