9 Best Red Dot Sights For Glock 17 Gen 5 Mos of 2026 With Secure Mounting

1

Ade RD3-013 Red Dot Reflex Sight for Glock MOS 17

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• ARS Mark

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  9.5
• Brand
  Ade Advanced Optics

Key specs2

Slide Compatibility

Glock MOS 17, 19, 34, 35, 40, 41

Sight Profile

Features an open reflex design intended for full-size Glock MOS slides, eliminating the need to modify standard factory slide cuts.

Pros & cons32

Pros

• Engineered specifically for Glock MOS slides including models 17, 19, 34, 35, 40, and 41
• Open reflex sight window provides quick target alignment on full-size pistol slides
• Direct compatibility with Glock factory MOS mounting systems simplifies slide attachment

Cons

• Optic footprint specifications and plate requirements are not detailed in the listing
• Does not list dot reticle MOA size or battery runtime figures

2

HOLOSUN HS407C X2 Red 2 MOA Dot Open Reflex Sight

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  8.1
• Brand
  HOLOSUN

Key specs2

Reticle and Power

Uses a crisp 2 MOA red dot paired with Solar Failsafe and motion-activated Shake-Awake technology for dependable operation.

Housing Material

Durable Aluminum

Pros & cons42

Pros

• Fine 2 MOA red dot reticle allows precise target acquisition without obscuring targets
• Solar Failsafe and Shake-Awake technology provide dual-layer power redundancy
• Durable aluminum housing withstands slide recoil on full-sized 9mm handguns
• Parallax-free optical design keeps point of aim consistent across the window

Cons

• Requires a compatible Glock MOS adapter plate not explicitly bundled in the listing
• Button lockout and settings configuration require learning the side-button interface

3

RMT S2 5 MOA Foldable Red Dot Reflex Sight Set

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  7.8
• Brand
  Gotical

Key specs2

Dot Size

5 MOA Red Dot

Mounting Hardware

• Glock mount base included
• 20mm Picatinny rail set adapter included

Pros & cons42

Pros

• Large 5 MOA red dot offers rapid dot acquisition during fast shooting sequences
• Foldable lens design folds flat to reduce overall slide profile during transport
• Includes both a Glock mount base and a 20mm Picatinny rail adapter in the set
• Integrated power saving function helps preserve battery life during inactive periods

Cons

• Foldable lens mechanism introduces mechanical pivot points that require careful zero retention checks
• Listing does not state MOS adapter plate compatibility for factory Gen 5 slide cuts

4

TSA® Rear Sight Dovetail Red Dot Optic Mount Plate for

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  8.6
• Brand
  TSA

Key specs2

Footprint Standard

Shield RMSc Footprint

Optic Fitment

Fits micro reflex sights including Holosun 407K, 507K, EPS Carry, Shield RMSc, and Sig Sauer Romeo Zero on Glock Gen 1 through 5 slides.

Pros & cons32

Pros

• Converts rear sight dovetail on Glock Gen 1-5 slides to accept RMSc footprint optics
• Compatible with popular micro optics like Holosun 407K, 507K, EPS Carry, and Romeo Zero
• Includes dedicated mounting screws and a T10 installation tool in the package

Cons

• Replaces the factory rear iron sight, eliminating rear backup iron sight functionality
• Designed for rear dovetails rather than direct attachment into factory MOS slide pockets

5

XS SIGHTS 3-Dot Tritium Night Sights, Fits Glock Gen 1

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  7.2
• Brand
  XS Sight Systems

Key specs2

Illumination Source

Tritium with Photoluminescent Glow Dot

Slide Sizing Warning

Sized for slimline Glock 42, 43, 43X, and 48 slides. Full-size Glock 17 Gen 5 owners should verify dovetail dimensions before purchasing.

Pros & cons32

Pros

• Tritium illumination provides steady visibility in low-light and darkness
• Dual-illuminated orange front sight pairs photoluminescent glow with a tritium vial
• Designed to fit Glock Gen 1 through 5 slides including MOS variants

Cons

• Listing specifies Glock 42, 43, 43X, and 48 frames, which do not fit standard Glock 17 slides
• Standard height profile will not co-witness through tall reflex optic windows

6

GOTICAL CNC-Machined Fiber Optic Set Front & Rear Handgun Sights

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  7.6
• Brand
  Gotical

Key specs2

Sight Material

CNC-Machined Metal

Optical Principle

Uses light-gathering fiber optic rods for high-contrast daytime sight picture alignment on standard Glock pistol slides.

Pros & cons32

Pros

• CNC-machined metal construction delivers sturdy slide mounting
• Bright fiber optic front and rear inserts collect ambient light for rapid daytime aiming
• Designed for standard Glock pistol slide dovetails

Cons

• Standard profile iron sight height may sit too low to co-witness through red dot optics
• Fiber optic rods do not glow in complete darkness without an external light source

7

TSA® XXX Glow Co Witness Tall Sights for Glock® MOS

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  7.2
• Brand
  TSA

Key specs2

Co-Witness Height

Tall Co-Witness for MOS

Slide Compatibility

• Glock 17, 19, 19X, 45, 47
• Compatible with Gen 1 through Gen 6 MOS

Pros & cons32

Pros

• Tall blade height co-witnesses cleanly through mounted red dot optic windows
• Green XXX glow pattern provides clear visual reference in dim shooting environments
• Directly fits full-size Glock 17 Gen 1 through Gen 6 slides including MOS models

Cons

• Higher sight profile requires checking holster clearance to avoid snagging
• Glow pattern requires ambient light charge unlike self-luminous tritium vials

8

TRUGLO TG231G1XW X Solid Steel Bright Night Sight Set Compatible

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  9.0
• Brand
  TRUGLO

Key specs2

Body Material

Solid Steel

Holster Fit

Designed with a smooth, snag-free exterior profile that maintains compatibility with most standard Glock holsters.

Pros & cons32

Pros

• Solid steel construction ensures high resistance against slide impact and holster wear
• Bright 3-dot night sight configuration aids fast alignment in darkness or low light
• Snag-free exterior contour fits standard concealed carry and duty holsters

Cons

• Standard sight height may be blocked by the optic body when mounted on a Glock MOS slide
• Specific Glock model compatibility list is unstated and must be verified before purchase

9

XS Sights DXT2 Big Dot Tritium Night Sights. Tritium Front

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  7.8
• Brand
  XS Sight Systems

Key specs2

Front Sight Color

High-Visibility Orange

Large-Frame Fitment

Fits large-frame Glock models 20, 21, 29, 30, 36, 37, 38, 39, 40, and 41 MOS, making it incompatible with Glock 17 9mm slides.

Pros & cons32

Pros

• Large high-visibility orange front dot speeds up sight acquisition under pressure
• Self-luminous tritium inserts in both front and rear sights glow continuously in the dark
• Supports large-frame Glock MOS versions including Glock 20, 21, and 40

Cons

• Engineered specifically for large-frame Glock slides and will not fit standard Glock 17 dovetails
• Express rear sight configuration does not match traditional 3-dot sight pictures

Last update on 2026-10-04 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

Which red dot footprints fit the Glock 17 Gen 5 MOS slide directly?

Glock MOS factory slides use a modular plate system rather than a single universal footprint cut directly into the slide steel. Dedicated sights like the Ade RD3-013 are designed specifically for Glock MOS slide configurations, including models 17, 19, and 34. For optics built around alternative mounting patterns such as the RMSc footprint found on the Holosun 407K, 507K, EPS Carry, and Shield RMSc, you must use a compatible adapter plate or dovetail base to ensure solid screw engagement and proper recoil lug alignment.

Do standard iron sights co-witness through a slide-mounted red dot?

No, standard-height factory iron sights sit too low to clear the base of a slide-mounted optic window. To establish a reliable backup aiming reference, you need taller sights such as the TSA XXX Glow Co Witness Tall Sights, which fit Glock MOS models including the G17. Taller sights allow you to see iron sights through the lower third of the optic glass, helping you confirm clear sight alignment if your electronic reticle ever loses power.

What reticle dot size works best on a full-size Glock 17 Gen 5 MOS?

A 2 MOA dot provides an ideal balance of speed and precision for a full-sized 9mm handgun. Reticles like the 2 MOA red dot on the Holosun HS407C X2 offer a crisp aiming point that does not obscure small targets at greater distances while remaining fast to acquire under rapid slide movement. Larger reticle options, such as the 5 MOA dot on the RMT S2 foldable sight, prioritize instant visual pickup for close-range shooting.

Can you mount micro-compact RMSc footprint optics to a Glock 17 Gen 5?

Yes, but doing so requires an appropriate mounting interface to bridge the slide cut to the smaller optic footprint. Hardware like the TSA Rear Sight Dovetail Red Dot Optic Mount Plate allows Glock 17 Gen 1-5 pistols to accept RMSc footprint optics, including the Shield RMSc, Romeo Zero, and Holosun 407K or 507K models. Always verify that your mounting plate kit includes the correct screw pitch and length to seat the optic firmly against the slide without binding internal parts.

Why do mounting screws cause cycling issues on a Glock MOS slide?

Mounting screws that are even slightly too long on the right side of the slide pass through the mounting hole and press directly into the extractor depressor plunger channel. This contact binds the plunger and prevents the extractor from pivoting freely, leading to immediate failure-to-extract malfunctions. You must verify screw penetration depth before torquing, confirm that the right screw does not contact internal slide parts, and ensure proper thread engagement to prevent screws from shearing under recoil.

What housing features keep an optic reliable under heavy slide recoil?

A rigid aluminum housing combined with secure mounting hardware gives the optic the structural strength needed to survive rapid slide acceleration. Sights like the Holosun HS407C X2 feature durable aluminum construction along with Shake-Awake motion sensing and Solar Failsafe technology to keep the dot ready without depleting battery reserves. Optic designs with dedicated power-saving functions help prevent unexpected shutoffs and maintain zero across thousands of rounds.