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Duty Arms Index

Pistol optic evaluation memo: Holosun 509T vs Trijicon RMR HD

Prepared Oct 11, 2026 from Duty Arms Index; agency data as of Oct 11, 2026. Specs as published by each maker, checked Oct 11, 2026.

Live page, sources and updates
Version comparedHolosun 509THolosun HE509T-RD X2Trijicon RMR HDTrijicon RMR HD (3.25 MOA dot / 55 MOA ring)
Mounting footprint509T Footprint [1]IDENTICAL FOOTPRINT AS RMR [2]
EmitterFully enclosed emitter [1]Not published
Mounting notes (maker's)RMR to 509T Adapter Plate [1]Not published
Reticle / dot size2 MOA Dot & 32 MOA Circle [1]3.25 MOA dot with 55 MOA Selectable Reticle [2]
Reticle colourNot publishedRed [2]
Window size0.66" x 0.9" [1]Not published
Brightness settings8 Daylight & 4 [1]Nine brightness settings with multiple modes [2]
Night-vision settingsNot publishedNot published
BatteryCR1632 [1]CR2032 [2]
Battery life (maker's stated)50,000 Hours [1]Over 3 years of continuous use in brightness setting 5, dot only [2]
Battery accessNot publishedTOP-LOADING BATTERY [2]
Auto-on / auto-brightnessShake Awake Technology [1]Not published
Dimensions1.6" x 1.16" x 1.13" [1]2.15 in x 1.27 in x 1.19 in [2]
Weight1.27 oz [1]1.69 oz. (47.91g) [2]
Housing material7075 T6 Titanium [1]7075-T6 aluminum [2]
Water rating (maker's stated)IP67 [1]waterproof up to 66 ft. (20 m) [2]
Maker list priceNot published$1,019.00 [2]
Agencies issuing (current entry)17 of 105 agencies with a sourced pistol optic5 of 105 agencies with a sourced pistol optic
Most common host pistolGlock G45 Gen5 MOS (5)Glock G17M (1)

Notices

No recalls, safety statements or agency actions on file for either model.

Sources

  1. [1] Holosun HE509T-RD X2. Holosun. Accessed Oct 11, 2026. https://www.holosun.com/products/he509t-x2-rd (archive: https://web.archive.org/web/2026/https://www.holosun.com/products/he509t-x2-rd)
  2. [2] Trijicon RMR HD Red Dot Sight. Trijicon. Accessed Oct 11, 2026. https://www.trijicon.com/products/details/rmhd2-c-3200002 (archive: https://web.archive.org/web/2026/https://www.trijicon.com/products/details/rmhd2-c-3200002)

Not a recommendation. Duty Arms Index records what agencies issue and what makers publish; it does not test, rate or endorse equipment. Specs are copied as published by each maker for the version named and can change without notice; output, battery-life and water figures are the maker's own and may use different test conditions. Verify with the manufacturer before purchase or policy decisions. Agency counts cover agencies with a sourced entry in the index, not all US agencies.

https://dutyarmsindex.com/compare/pistol-optics/holosun-509t-vs-trijicon-rmr-hd