What red dots fit the GLOCK 17 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
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
Cheapest ways to mount it
Every optic, and how it mounts
Adapter plates for the GLOCK 17 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 25 optics on this slide
- Trijicon RMR Type 2
- Dawson Precision · co-witness · front .405 / rear .395 in
- 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
- Dawson Precision · co-witness · front .405 / rear .395 in
- 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
- Dawson Precision · co-witness · front .405 / rear .395 in
- 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
- Dawson Precision · co-witness · front .505 / rear .495 in
- 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
- Vortex Viper
- Dawson Precision · co-witness · front .405 / rear .395 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.
Dawson Precision — fixed co-witness set for GLOCK 17/19 Gen5 MOS with an RMR ↗ Night Fision — co-witness chart for GLOCK 17/19/26/34/45 ↗ Dawson Precision — fixed co-witness set for GLOCK 17/19 Gen5 MOS with a DeltaPoint Pro ↗
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.