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What red dots fit the GLOCK 43X / 48 MOS-K?

21 of the 71 optics tracked here mount to this slide, and 20 of those need no adapter plate. This slide uses GLOCK Slimline MOS-K.

Mount systemGLOCK Slimline MOS-K
Optics that fit21 of 71
No plate needed20
Plate to slideper optic manual
Slide tappedM3
How this slide mounts an opticLater slim-slide cut that takes either the Holosun K or the RMSc pattern with no plate. Uses the M3 screws supplied with the optic, not the M4s from the earlier Slimline MOS.
On this modelLater slim-slide cut. Check which one you have — the screw thread differs.
Screw thread trapTapped M3, not the M4 of the earlier Slimline MOS. The two slim GLOCK cuts look alike and take different screws — this is the single most common cross-threading mistake on slim GLOCKs.

Cheapest ways to mount it

Cheapest overall$60–150SIG Sauer ROMEOZerodirect — no adapter
Cheapest with no plate$60–150SIG Sauer ROMEOZerodirect — no adapter
Cheapest enclosed emitter$300–450Holosun EPS Carrydirect — no adapter

Every optic, and how it mounts

ItemFootprintHow it mountsCost to mount
Direct — 7
Holosun 407K X2Holosun Kdirect — no adapter$150–300
Holosun 507K X2Holosun Kdirect — no adapter$300–450
Holosun 507K X3 / 407K X3Holosun Kdirect — no adapter$300–450
Holosun EPS EnclosedHolosun Kdirect — no adapter$300–450
Holosun EPS Carry EnclosedHolosun Kdirect — no adapter$300–450
Holosun SCS Carry EnclosedHolosun Kdirect — no adapter$300–450
Olight Osight KHolosun Kdirect — no adapter$60–150
Direct · alt — 13
Crimson Trace CTS-1550Shield RMScdirect — no adapter$150–300
JP Enterprises JPointShield RMScdirect — no adapter$150–300
Olight Osight SShield RMScdirect — no adapter$60–150
Primary Arms Classic 21 mm MicroShield RMScdirect — no adapter$60–150
Riton 3 TACTIX MPRD 2Shield RMScdirect — no adapter$150–300
Shield Sights RMS2Shield RMScdirect — no adapter$150–300
Shield Sights RMScShield RMScdirect — no adapter$150–300
SIG Sauer ROMEO-X CompactShield RMScdirect — no adapter$150–300
SIG Sauer ROMEOZeroShield RMScdirect — no adapter$60–150
SIG Sauer ROMEOZero EliteShield RMScdirect — no adapter$150–300
Swampfox Sentinel IIShield RMScdirect — no adapter$60–150
Viridian RFX35Shield RMScdirect — no adapter$60–150
Vortex Defender-CCWShield RMScdirect — no adapter$150–300
Plate — 1
SIG Sauer ROMEO2 EnclosedSIG Romeo2plates included with the optic$450–650
No fit — 50
ADE Delta ProTrijicon RMRno known route$60–150
ADE NUWAcc ProTrijicon RMRccno known route$60–150
Aimpoint ACRO C-2 EnclosedAimpoint ACROno known route$450–650
Aimpoint ACRO P-1 EnclosedAimpoint ACROno known route$450–650
Aimpoint ACRO P-2 EnclosedAimpoint ACROno known route$650–900
Aimpoint COA EnclosedAimpoint COA / A-Cutno known route$650–900
Aimpoint Micro T-2 EnclosedAimpoint Microno known route$650–900
Ameriglo HavenTrijicon RMRno known route$150–300
Burris FastFire 3Docter / Noblexno known route$150–300
Burris FastFire 4Docter / Noblexno known route$150–300
Bushnell RXS-100Leupold DeltaPoint Prono known route$150–300
C-More RTS2C-More RTS2 / STS2no known route$300–450
C-More STS2C-More RTS2 / STS2no known route$300–450
C&H Precision CompTrijicon RMRno known route$300–450
Cyelee Cat / WolfTrijicon RMRno known route$60–150
EOTECH EFLX MiniLeupold DeltaPoint Prono known route$300–450
Holosun 407C X2Trijicon RMRno known route$150–300
Holosun 407COMPTrijicon RMRno known route$300–450
Holosun 507C X2Trijicon RMRno known route$300–450
Holosun 507C X3 / 407C X3Trijicon RMRno known route$300–450
Holosun 507COMPTrijicon RMRno known route$300–450
Holosun 508T X2Trijicon RMRno known route$300–450
Holosun 509T EnclosedHolosun 509Tno known route$450–650
Holosun SCS 320 EnclosedHolosun SCS (320)no known route$300–450
Holosun SCS MOS EnclosedHolosun SCS (MOS)no known route$300–450
Leapers UTG OP3 MicroDocter / Noblexno known route$60–150
Leupold DeltaPoint ProLeupold DeltaPoint Prono known route$300–450
Lucid Optics E7 EnclosedAimpoint ACROno known route$150–300
Meopta MeoSight IVDocter / Noblexno known route$150–300
Meprolight MPO-DFTrijicon RMRno known route$300–450
Noblex Sight III / Docter Sight CDocter / Noblexno known route$300–450
Riton 3 TACTIX PRDTrijicon RMRno known route$150–300
SIG Sauer ROMEO-X EnclosedSIG-LOCno known route$300–450
SIG Sauer ROMEO-X ProLeupold DeltaPoint Prono known route$300–450
SIG Sauer ROMEO1PROSIG Romeo1Prono known route$300–450
Sightmark Mini Shot A-SpecDocter / Noblexno known route$60–150
Steiner MPS EnclosedAimpoint ACROno known route$450–650
Swampfox Justice IITrijicon RMRno known route$150–300
Swampfox Liberty IITrijicon RMRno known route$150–300
Trijicon RCR EnclosedTrijicon RCRno known route$650–900
Trijicon RMR HDTrijicon RMRno known route$650–900
Trijicon RMR Type 2Trijicon RMRno known route$450–650
Trijicon RMRccTrijicon RMRccno known route$450–650
Trijicon SROTrijicon RMRno known route$450–650
Viridian RFX45 EnclosedAimpoint ACROno known route$150–300
Vortex Defender-SLLeupold DeltaPoint Prono known route$150–300
Vortex Defender-STLeupold DeltaPoint Prono known route$300–450
Vortex Defender-XLLeupold DeltaPoint Prono known route$300–450
Vortex VenomDocter / Noblexno known route$150–300
Vortex ViperDocter / Noblexno known route$150–300

Check a specific pairing

The interactive fit checker gives you a single verdict for this pistol and any optic, plus a build sheet with the plate SKU, screw threads, torque figures and install order.