The best red dot for a Glock
Quick answer: for a full-size or compact Glock MOS (17, 19, 45), the Holosun HS507C-X2 (around $230) is the best red dot: it mounts on the MOS plate for its footprint and its selectable dot suits carry and range. For the slim Glock 43X and 48, the Vortex Defender-CCW (around $220) fits the standard RMSc cut with no plate. On a budget, the ADE Trumpet PRO (around $120) is the value pick. Full specs are on our best red dot sight guide.
Putting a red dot on a Glock comes down to one thing first: fitment. A Glock MOS pistol uses adapter plates, so the dot has to match a plate for the full-size guns, while the slim 43X and 48 are cut directly for the Shield RMSc footprint. Get the footprint right and the rest is the same as any pistol dot: a fast dot size, a build that holds zero under slide-ride recoil, and an emitter suited to how you carry. These picks are the same dots from our roundup, matched here to the Glock you own.
One exception worth knowing before you pick a plate: the Holosun SCS MOS (around $350) is cut for the Glock MOS slide itself, so it takes no plate at all and sits low enough that your factory-height irons still co-witness. It costs you manual brightness, shake awake and window size to get there, and it fits double-stack MOS slides only, so it is a deliberate trade rather than a straight upgrade. Our picks below are the plate-based route.
Our picks by Glock model
Best for full-size Glock MOS (17, 19, 45): Holosun HS507C-X2
around $230 4.8/5, 471 reviews on OpticsPlanet
For a full-size or compact Glock MOS this is the dot to buy first. It rides the widely supported RMR footprint, so it mounts on the Glock MOS plate cut for that pattern, and its selectable reticle gives you a precise 2 MOA dot or a fast 32 MOA circle-dot for defensive use. A solar panel backs up the battery for a 50,000-hour life, shake awake wakes it on movement, and Lock Mode prevents accidental button presses. Owners specifically run it on Glocks and report it holding zero through courses, and it carries the Holosun lifetime warranty. It is the versatile, proven default for a 17, 19 or 45 MOS.
Best for the slim Glock 43X and 48: Vortex Defender-CCW
around $220 4.7/5, 226 reviews on OpticsPlanet
The slim Glock 43X MOS and 48 MOS are cut directly for the Shield RMSc footprint, and Vortex lists the Defender-CCW on exactly that footprint, so it mounts on the standard cut with no adapter plate. Its large viewing window is the one owners repeatedly call the biggest they could find for everyday carry, which makes the dot quick to pick up on the draw. A ShockShield polymer insert cushions the electronics, a Fast-Rack front lets you rack the slide off a belt or boot, and the top-loading battery changes without re-zeroing. Choose the 3 or 6 MOA dot, and it carries the unconditional Vortex VIP lifetime warranty. The trade-off is battery: a 9,500-hour life, shorter than a Holosun with shake awake. If your slide is Glock's newer MOS-K cut (item number ending in MOSK), the Holosun HS407K-X2 also mounts with no plate and adds a side-loading battery on a 50,000-hour life; our Defender-CCW vs HS407K-X2 comparison weighs the two.
Best budget for a Glock: ADE Trumpet PRO RD3-029
around $120 4.9/5, 246 reviews on OpticsPlanet
For a first optic Glock or a range gun, this is the most dot for the least money. The Trumpet PRO is an open-reflex micro on the RMR footprint with a 4 MOA dot, motion-awake, and a side-loading battery tray, so it mounts on a full-size Glock MOS with the RMR-pattern plate. Owners specifically mount it on a Glock 19 and Glock 41 and report it holding zero past a thousand rounds, and it rates 4.9/5 across 246 reviews. Be clear-eyed: ADE is a value house brand without the proven duty record of a Holosun or Trijicon, the plate is separate, and there is no lifetime warranty, so it suits range and carry-practice over a hard-duty gun.
Prices verified September 30, 2026; confirm the current price on the OpticsPlanet product page before buying.
How to choose a red dot for your Glock
- Match the footprint to your slide. Full-size Glock MOS guns (17, 19, 45) use plates, so pick the plate cut for your dot; the slim 43X and 48 are cut for the RMSc footprint directly, and Glock's newer MOS-K slides (item number ending in MOSK) also take Holosun K optics. A non-MOS Glock needs slide milling or a dovetail mount first.
- Dot size for the job. A 6 MOA dot is fast on a carry gun; a selectable circle-dot like the HS507C-X2 gives you both a precise dot and a fast ring.
- Slide-ride durability. A pistol slams the optic on every shot, so zero retention and a sealed housing matter more than on a rifle. All three picks are chosen for it.
- Stepping up to duty. For a hard-use Glock where failure is not an option, the Trijicon RMR Type 2 is the RMR-footprint duty standard, covered in full on our pistol red dot page.
New to running a dot? See how to sight in a red dot sight. Comparing carry and duty options in depth? See our best pistol red dot guide.
FAQ
What red dot fits a Glock MOS?
A Glock MOS pistol ships with a set of adapter plates, and the dot fits whichever plate matches its footprint. Full-size and compact MOS models (Glock 17, 19, 45 MOS) take a plate for the RMR, Holosun 507/508 or similar footprint, so the Holosun HS507C-X2 mounts with the correct plate. The slim Glock 43X and 48 MOS use the Shield RMSc footprint directly, which the Vortex Defender-CCW fits without a plate.
Do you need a plate for a red dot on a Glock?
On a full-size or compact Glock MOS, yes: you install the plate cut for your dot’s footprint, then the dot on the plate. The slim Glock 43X and 48 MOS are the exception, cut directly for the Shield RMSc footprint so an RMSc dot mounts with no plate. Glock says its newer Slimline MOS-K cut (item number ending in MOSK) takes Holosun K optics without a plate. A non-MOS Glock has no cut at all, so it needs either a milled slide or a rear-sight dovetail mount before any dot will fit.
What is the best red dot for a Glock 19?
The Glock 19 and 19 MOS are compact full-size guns, so the versatile Holosun HS507C-X2 is the best all-around choice: it mounts on the MOS plate for its footprint, its selectable 2 MOA dot or 32 MOA circle suits both carry and range, and owners run it on Glocks and report it holding zero. On a budget the ADE Trumpet PRO is the value pick; for a duty Glock 19 the Trijicon RMR Type 2 is the premium standard.
What dot size is best for a Glock carry gun?
A 6 MOA dot is popular on a carry Glock because it is fast to find under stress, while a 2 to 3 MOA dot is more precise for target work. The Holosun HS507C-X2 sidesteps the choice with a selectable 2 MOA dot inside a 32 MOA circle, giving you a precise dot and a fast ring in one optic. The Vortex Defender-CCW comes in a 3 or 6 MOA dot, and the 6 MOA is the fast choice on the slim carry guns it fits.
More: best red dot sights overall · best pistol red dot · Defender-CCW vs HS407K-X2 · Trijicon SRO review · Leupold DeltaPoint Pro review · Aimpoint ACRO P-2 review · best red dot for astigmatism.