What red dots fit the GLOCK 45 Gen5 MOS?
Page last updated . Data compiled September 2026 by Andrew Terrebonne.
71 of the 77 optics tracked here mount to this slide, and 1 of those needs no adapter plate. This slide uses GLOCK MOS — standard & full size.
No plate neededPlate neededDoesn’t fit
Mount systemGLOCK MOS — standard & full size
Optics that fit71 of 77
Direct mount1
No plate to buy19
Plate to buy52
Plate to slide13.1 in-lb (1.5 Nm)
No plate to buy counts the direct mounts plus the pairings whose plate normally comes in the pistol's or the optic's box. Box contents change between production runs, so check yours before counting on it.
New to red dots? What footprint, plate, co-witness and the rest mean
Is yours a MOS?A MOS slide has a flat cover plate held on by two screws, just in front of the rear sight, and the
item number on its box and paperwork ends in MOS. No cover plate means no optic cut, and none of this
page applies: see the non-MOS GLOCK page instead.
Cheapest ways to mount it
Same slide cutThe GLOCK 19 Gen5 MOS, GLOCK 17 Gen5 MOS, GLOCK 47 Gen5 MOS, GLOCK 49 Gen5 MOS, GLOCK 19X MOS, GLOCK 34 Gen5 MOS, GLOCK 26 Gen5 MOS and GLOCK 17 / 19 / 34 Gen4 MOS, and 3 more share this slide's optic cut
(GLOCK MOS — standard & full size), so the optics, plates and screws below are the same for
all of them. What differs between the models is under "On this model", where there is anything.
How this slide mounts an opticGLOCK's 9 mm, .40 and .357 MOS slides (Gen4 and Gen5) take its 25.5 mm plates. Recent MOS pistols come with plate 02 (the RMR pattern); earlier ones came with a set, so look in your box before ordering. Plates 01, 03 and 04 are sold separately.
Every optic, and how it mounts
Adapter plates for the GLOCK 45 Gen5 MOS
| Plate | Gives you | Source | Price |
|---|---|---|---|
| MOS Plate 01Docter, Meopta, Insight, Vortex Venom / Viper, Burris FastFire | Docter / Noblex | GLOCK factory ↗ | $13–25 |
| MOS Plate 02Trijicon RMR / SRO, Ameriglo, Holosun C-series. Standard MOS pistols ship with this plate. Plates 01, 03 and 04 are factory parts sold separately. | Trijicon RMR | GLOCK factory ↗ | in the box |
| MOS Plate 03C-More RTS2 / STS2 | C-More RTS2 / STS2 | GLOCK factory ↗ | $13–25 |
| MOS Plate 04Leupold DeltaPoint Pro and DPP-pattern optics such as the EOTech EFLX | Leupold DeltaPoint Pro | GLOCK factory ↗ | $13–25 |
| ROMEO2 GLOCK MOS adapter plate (SOR2M102)SIG's own plate for the ROMEO2 on standard MOS slides, sold separately. SIG no longer lists it on its site; retailers still stock it. | SIG Romeo2 | SIG Sauer | $25–60 |
| V4 MIL/LEO → Trijicon RMR / SRO / Holosun 407C / 507C / 508TSits lower than the factory plate and is the usual upgrade when a factory plate keeps loosening. Optic screws go into steel T-nuts in the plate; screws for each optic come with it. | Trijicon RMR | C&H Precision ↗ | $25–60 |
| V4 MIL/LEO (one SKU per footprint)The same plate for other footprints: order the version made for your optic. | Leupold DeltaPoint Pro Aimpoint ACRO Holosun K Shield RMSc Holosun 509T Trijicon RMRcc SIG Romeo1Pro Trijicon RCR | C&H Precision | $25–60 |
| Type A / Type BType A covers RMSc / DPP / Docter; Type B covers RMR / RTS2. | Shield RMSc Docter / Noblex Leupold DeltaPoint Pro Trijicon RMR C-More RTS2 / STS2 | Optics Spot | $25–60 |
| MOS → RCR (steel) | Trijicon RCR | Athena Precision ↗ | $60–95 |
Iron sights that co-witness
Typical co-witness by optic type; figures published for this slide are below, with their source.
Sight heights published for 24 optics on this slide
- Trijicon RMR Type 2
- Night Fision · lower 1/3 · front .330 / rear .353 in
- Trijicon RMR HD
- Night Fision · lower 1/3 · front .358 / rear .381 in
- Trijicon SRO
- Night Fision · lower 1/3 · front .358 / rear .381 in
- Night Fision · lower 1/5 · front .330 / rear .353 in
- Holosun 507C X2
- Night Fision · absolute · front .469 / rear .494 in
- Night Fision · lower 1/3 · front .330 / rear .353 in
- Night Fision · lower 1/5 · front .290 / rear .313 in
- Holosun 407C X2
- Night Fision · absolute · front .469 / rear .494 in
- Night Fision · lower 1/3 · front .330 / rear .353 in
- Night Fision · lower 1/5 · front .290 / rear .313 in
- Holosun 508T X2
- Night Fision · absolute · front .469 / rear .494 in
- Night Fision · lower 1/3 · front .330 / rear .353 in
- Night Fision · lower 1/5 · front .290 / rear .313 in
- Swampfox Justice II
- Night Fision · absolute · front .469 / rear .494 in
- Night Fision · lower 1/3 · front .330 / rear .353 in
- Swampfox Liberty II
- Night Fision · absolute · front .469 / rear .494 in
- Night Fision · lower 1/3 · front .330 / rear .353 in
- C&H Precision Comp
- Night Fision · lower 1/3 · front .465 / rear .472 in
- Night Fision · lower 1/5 · front .330 / rear .353 in
- Ameriglo Haven
- Night Fision · lower 1/5 · front .290 / rear .313 in
- Shield Sights RMS2
- Night Fision · absolute · front .469 / rear .494 in
- Night Fision · lower 1/3 · front .290 / rear .313 in
- Viridian RFX35
- Night Fision · lower 1/3 · front .260 / rear .267 in
- Holosun EPS Carry
- Night Fision · lower 1/5 · front .163 / rear .175 in
- Holosun EPS
- Night Fision · absolute · front .290 / rear .313 in
- Night Fision · lower 1/3 · front .260 / rear .267 in
- Leupold DeltaPoint Pro
- Night Fision · lower 1/3 · front .469 / rear .494 in
- Vortex Venom
- Night Fision · lower 1/3 · front .469 / rear .494 in
- Night Fision · lower 1/5 · front .330 / rear .353 in
- Burris FastFire 3
- Night Fision · absolute · front .469 / rear .494 in
- Night Fision · lower 1/3 · front .330 / rear .353 in
- Night Fision · lower 1/5 · front .290 / rear .313 in
- Aimpoint ACRO P-2
- Night Fision · absolute · front .469 / rear .494 in
- Night Fision · lower 1/3 · front .330 / rear .353 in
- Night Fision · lower 1/5 · front .290 / rear .313 in
- Steiner MPS
- Night Fision · lower 1/3 · front .290 / rear .313 in
- Holosun 509T
- Night Fision · lower 1/3 · front .469 / rear .494 in
- Trijicon RCR
- Night Fision · absolute · front .469 / rear .494 in
- Night Fision · lower 1/3 · front .465 / rear .472 in
- Night Fision · lower 1/5 · front .330 / rear .353 in
- Holosun SCS MOS
- Night Fision · absolute · front .290 / rear .313 in
- Night Fision · lower 1/3 · front .163 / rear .175 in
- SIG Sauer ROMEO1PRO
- Night Fision · lower 1/3 · front .469 / rear .494 in
- SIG Sauer ROMEO2
- Night Fision · lower 1/3 · front .330 / rear .353 in
Heights are front / rear in inches, as each sight maker measures its own sights. That's not a deck height, and it doesn't compare across makers to the thousandth. Absolute puts the front sight level with the dot; lower 1/3 and lower 1/5 sit it lower in the window. A sight maker sells a handful of fixed heights, so optics of similar height share one set: the same figures under two optics are the maker's chart saying so, not a copy.
GuidesWhich GLOCK MOS plate do I need? · Suppressor-height sights: will your irons co-witness? · Installing a red dot: what the makers say
Check a specific pairing
Open the fit checker with this pistol selected, or click any "how it mounts" cell above for that pairing's verdict and build sheet.
Deciding between a few? Compare 3 popular optics on this slide side by side: window, weight, emitter, cost to mount and co-witness.
Something on this page wrong?
Tell us what it should be, and include a source: nothing changes without one.