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Glock 48 MOS optic footprint: what red dots fit

Glock 48 MOS

Cut for the Shield RMSc pattern, the Glock 48 MOS takes micro optics only: two mounting screws with four locating bosses machined into the slide. RMSc-footprint dots seat on those bosses and bolt down directly, no plate involved. Holosun K-series optics (407K, 507K, EPS Carry) share the screw spacing but have two locating pockets rather than four, so on this cut they mount over an adapter plate. RMR-class optics are out entirely; the slimline slide has neither the width nor a plate path to that footprint.

Two different slimline cuts are in circulation, so check the item number on the case sticker first. The original, marked MOS, is the four-boss RMSc pattern. The updated cut Glock began shipping in late 2025 is marked MOSK and uses the two-boss Holosun K pattern, which mounts K-series dots directly with no plate. Same pistol, different mounting answer, and the sticker is how you tell.

Optics that fit
21
No plate needed
16
Plate required
5
Footprints accepted
Shield RMSc / Holosun K
Open the interactive checker on the Glock 48 MOS
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Mounts directly (Shield RMSc footprint)(16)

These optics carry the Shield RMSc footprint the slide is cut for. Screws, recoil bosses, and pocket all line up, so they seat on the slide with no plate.

C&H Precision EDC red dot for Glock 48 MOS
C&H Precision

C&H Precision EDC

$199.99EPS / KShield RMSc

Compact open-emitter carry optic on the RMSc footprint with red, green, and MRS variants

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Osight K (RMSc 6 MOA Green) red dot for Glock 48 MOS
Osight

Osight K (RMSc 6 MOA Green)

$169.99Shield RMSc

Green-dot version of the open-emitter RMSc Osight K, with a 6 MOA green dot, side-loading CR1620, and motion sensor activation.

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Osight K (RMSc 6 MOA Open) red dot for Glock 48 MOS
Osight

Osight K (RMSc 6 MOA Open)

$159.99Shield RMSc

Entry-level open-emitter RMSc red dot with a 6 MOA dot, side-loading CR1620, and motion sensor activation.

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Osight SE Enclosed (2 MOA + 32 MOA Red MRS) red dot for Glock 48 MOS
Osight

Osight SE Enclosed (2 MOA + 32 MOA Red MRS)

$199.99Shield RMSc

Enclosed-emitter red dot on the RMSc footprint with a switchable 2 MOA dot and 32 MOA circle, side-loading battery, and IPX7 sealing.

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Osight SE Enclosed (6 MOA Green) red dot for Glock 48 MOS
Osight

Osight SE Enclosed (6 MOA Green)

$199.99Shield RMSc

Enclosed-emitter green dot on the RMSc footprint with a side-loading battery and a 75,000-hour runtime, at a value price.

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Osight SE Enclosed (6 MOA Red) red dot for Glock 48 MOS
Osight

Osight SE Enclosed (6 MOA Red)

$179.99Shield RMSc

Enclosed-emitter 6 MOA red dot on the RMSc footprint with a side-loading battery, motion sensor, and IPX7 sealing for slim carry guns.

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C&H Precision EDC Enclosed red dot for Glock 48 MOS
C&H Precision

C&H Precision EDC Enclosed

$249.99EPS / KShield RMSc

Enclosed-emitter RMSc-footprint carry optic with a low-profile compact housing

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C&H Precision Max red dot for Glock 48 MOS
C&H Precision

C&H Precision Max

$339.99EPS / KShield RMSc

Large-window RMSc-footprint multi-reticle optic for compact pistols and shotgun plates

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Osight S Enclosed (Magnetic Charging) red dot for Glock 48 MOS
Osight

Osight S Enclosed (Magnetic Charging)

$249.99Shield RMSc

Enclosed-emitter RMSc red dot with a magnetic charging cover, OAL housing, and a 2 MOA + 32 MOA multi-reticle system.

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SIG Romeo Zero Elite red dot for Glock 48 MOS
SIG Sauer

SIG Romeo Zero Elite

$129.99Shield RMSc

Sub-half-ounce micro red dot on the Shield RMSc footprint for P365 and similar carry pistols

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Swampfox Sentinel II red dot for Glock 48 MOS
Swampfox

Swampfox Sentinel II

$249Shield RMSc

Mid-tier RMSc-footprint micro red dot with Shake N' Wake auto-on, recessed hood for lens protection, and a clean 3 MOA dot, $269 (red) or $299 with tritium.

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Vortex Defender-CCW Enclosed Solar red dot for Glock 48 MOS
Vortex

Vortex Defender-CCW Enclosed Solar

$259.49Shield RMSc

Closed emitter micro pistol optic with solar assist on the Shield RMSc footprint

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C&H Precision HNT-R Max red dot for Glock 48 MOS
C&H Precision

C&H Precision HNT-R Max

$399.99EPS / KShield RMSc

Camo RMSc-footprint hunting red dot for handguns, shotguns, and scout-style mounts

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Shield RMSc 4 MOA (Glass Edition) red dot for Glock 48 MOS
Shield Sights

Shield RMSc 4 MOA (Glass Edition)

$379.99Shield RMSc

The original RMSc that defined the slim-pistol footprint standard. UK-made glass-edition reflex sight with a 4 MOA dot, $379, the platonic Shield-cut optic.

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SIG ROMEO-X Compact Enclosed red dot for Glock 48 MOS
SIG Sauer

SIG ROMEO-X Compact Enclosed

$499.99Shield RMSc

SIG's enclosed-emitter pistol red dot on the RMSc footprint, with MOTAC motion activation and a side-loading CR1632.

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Trijicon RMRcc red dot for Glock 48 MOS
Trijicon

Trijicon RMRcc

$519.99Shield RMSc

Trijicon quality in a compact package for slim carry pistols

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Mounts with an adapter plate(5)

These optics use the same screw spacing but a different locating pattern from the Glock 48 MOS slide cut, so they mount on a plate that bolts into the slide and presents the matching pattern to the optic.

Glock 48 MOS optic fitment FAQ

What optic footprint does the Glock 48 MOS use?

Cut for the Shield RMSc pattern, the Glock 48 MOS takes micro optics only: two mounting screws with four locating bosses machined into the slide. RMSc-footprint dots seat on those bosses and bolt down directly, no plate involved. Holosun K-series optics (407K, 507K, EPS Carry) share the screw spacing but have two locating pockets rather than four, so on this cut they mount over an adapter plate. RMR-class optics are out entirely; the slimline slide has neither the width nor a plate path to that footprint.

Do I need an adapter plate to mount a red dot on the Glock 48 MOS?

Only for some optics. The Glock 48 MOS slide is cut for the Shield RMSc footprint, so Shield RMSc optics bolt straight to the slide with no plate. Optics that do not share that locating pattern, the Holosun 407K X2, Holosun 507K X2 and Holosun EPS Carry among them, mount over an adapter plate that bolts into the slide first.

Does the Holosun 507K X2 fit a Glock 48 MOS?

Yes, on a plate. The Holosun 507K X2 is a Shield RMSc / Holosun K footprint optic, so it mounts on the Glock 48 MOS using the Calculated Kinetics Glock 43X / 48 MOS Adapter Plate. Install the plate to the slide first, then the optic to the plate.

Does the Holosun EPS Carry fit a Glock 48 MOS?

Yes, on a plate. The Holosun EPS Carry mounts on the Glock 48 MOS using the Calculated Kinetics Glock 43X / 48 MOS Adapter Plate. Install the plate to the slide first, then the optic to the plate.

Does the Trijicon RMRcc fit a Glock 48 MOS?

Yes. The Trijicon RMRcc uses the Shield RMSc footprint that the Glock 48 MOS slide is cut for, so it bolts straight to the slide with no adapter plate.

Does the SIG Romeo Zero Elite fit a Glock 48 MOS?

Yes. The SIG Romeo Zero Elite uses the Shield RMSc footprint that the Glock 48 MOS slide is cut for, so it bolts straight to the slide with no adapter plate.

Do Glock 43X MOS and Glock 48 MOS take the same optics?

Yes. The two share the slimline MOS cut, so any optic or adapter plate that fits one fits the other. The difference between them is slide and barrel length, not the optic pocket.

Can I mount an RMR on a Glock 48 MOS?

No. The slimline slide is cut for the micro RMSc pattern and is too narrow for an RMR-class optic. No adapter plate converts the slimline cut up to an RMR footprint.

Keep reading

Best Glock 48 upgradesBest Glock 43X upgradesBest pistol red dotsCheck co-witness height

Optic footprints for other Glock models

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