Glock MOS Red Dot Sights

You bought a MOS slide so you could mount optics cleanly and swap models without milling — this page shows you the best red dots for Glock MOS, which plates they use, and how to set them up right the first time.

Top picks by use

• Concealed carry (enclosed emitter): Aimpoint ACRO P-2, Holosun 509T, Holosun EPS/EPS Carry

• Do-it-all (RMR footprint): Trijicon RMR Type 2, Holosun 507C, Holosun 508T

• Speed/range (big window): Trijicon SRO, Leupold DeltaPoint Pro

• Budget-friendly: Holosun 407C, Shield RMSx (with correct adapter)

Fit and footprints

Glock MOS uses plates that match optic footprints.

• RMR footprint: Trijicon RMR/SRO, Holosun 407C/507C/508T

• ACRO footprint: Aimpoint ACRO P-2

• DeltaPoint Pro footprint: Leupold DPP

• 509T rail footprint: Requires its dedicated MOS adapter

• RMSc micro footprint: Shield RMSx/RMSc, Holosun EPS Carry via appropriate adapter

Plates you actually need

• RMR/SRO/507C/508T → RMR MOS plate

• ACRO P-2 → ACRO MOS plate

• DeltaPoint Pro → DPP MOS plate

• Holosun 509T → 509T MOS adapter/plate

• EPS/EPS Carry → Adapter for RMR or RMSc depending on model

What to consider before you buy

• Emitter style: Enclosed keeps rain, sweat, and lint off the diode; open is lighter with larger windows.

• Battery service: Side/top trays (507C/508T/509T/EPS/ACRO) avoid re-zeroing; bottom batteries are tougher but need removal.

• Window vs concealment: Big windows track faster; smaller housings print less under a shirt.

• Durability: Titanium or hard-anodized aluminum housings survive daily carry and drops.

• Buttons/brightness: True daylight settings, NV modes if you need them, shake-awake for carry.

Co-witness quick guide

On most MOS setups with RMR-footprint optics, ~0.300–0.365 in front sights give a lower 1/3 view. Go taller “suppressor height” if you want more iron visibility or run a can.

Install tips that prevent headaches

Degrease screws and plate, use a tiny amount of Blue Loctite, torque to manufacturer spec, witness-mark screws, confirm zero after 50–100 rounds, re-check at 500.

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FAQ

Do I need a plate or can I bolt the optic straight on?
You need a MOS plate that matches the optic footprint. RMR, ACRO, DPP, and 509T each use different interfaces.

What’s the best red dot for concealed carry on a Glock MOS?
Enclosed emitters are most forgiving in weather and pocket lint. Top choices are Aimpoint ACRO P-2, Holosun 509T, and Holosun EPS/EPS Carry with the correct plate.

Does the Trijicon SRO fit Glock MOS?
Yes, it uses the RMR MOS plate. Verify holster clearance because the SRO’s window is taller.

Which plate for a Holosun 507C on Glock MOS?
Use an RMR-pattern MOS plate. The 507C shares the RMR footprint.

Will a red dot fit a Glock Gen5 MOS without slide milling?
Yes. That’s the purpose of MOS. Choose the correct plate, mount, torque, and go.

What sight height do I need to co-witness?
With many RMR-footprint optics on MOS, fronts around 0.300–0.365 in typically yield a lower 1/3 co-witness. Suppressor-height irons give a fuller view.

Open vs enclosed emitter—how do I choose?
Open emitters are lighter with larger windows and often cheaper. Enclosed emitters protect the diode from rain and debris, which is ideal for duty and daily carry.