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Home / Pistols / SIG Sauer P365X / P365-XL / P365-AXG Legion (SIG-LOC slide)

What red dots fit the SIG Sauer P365X / P365-XL / P365-AXG Legion (SIG-LOC slide)?

3 of the 75 optics tracked here mount to this slide, and 2 of those need no adapter plate. This slide uses SIG-LOC slide — P365.

Mount systemSIG-LOC slide — P365
Optics that fit3 of 75
No plate needed2
Plate to slideper SIG manual
Verify this onePublished fitment information for this slide is thin or contested, so it carries a verify flag. SIG sells SIG-LOC optic-ready slide assemblies across the P365 line — P365X, P365-XL, the .380 integrated-comp XL and the P365-AXG Legion. The ROMEO-X SIG-LOC Compact is scoped by SIG to these slides specifically. As with the M17/M18 SIG-LOC slide, top-mount optics still fit via removable recoil-lug pins, but the pattern those pins give is not published. Confirm with the plate maker before ordering.
On this modelSold by SIG as a SIG-LOC optic-ready slide assembly for the P365 line, including the .380 integrated-comp XL. Confirm your slide is the SIG-LOC one — the standard P365 optic cut is a milled RMSc and takes different optics entirely.

Cheapest ways to mount it

Cheapest overall$300–450SIG Sauer ROMEO-Xdirect — no adapterBuild sheet →
Cheapest with no plate$300–450SIG Sauer ROMEO-Xdirect — no adapterBuild sheet →
Cheapest enclosed emitter$300–450SIG Sauer ROMEO-Xdirect — no adapterBuild sheet →

Every optic, and how it mounts

ItemFootprintHow it mountsCost to mount
Direct — 2
SIG Sauer ROMEO-X EnclosedSIG-LOCdirect — no adapter$300–450
SIG Sauer ROMEO-X SIG-LOC Compact EnclosedSIG-LOCdirect — no adapter$450–650
Plate — 1
SIG Sauer ROMEO2 EnclosedSIG Romeo2plates included with the optic$450–650
No fit — 72
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
Crimson Trace CTS-1550Shield RMScno known route$150–300
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 407K X2Holosun Kno known route$150–300
Holosun 507-PromaxTrijicon 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 507K X2Holosun Kno known route$300–450
Holosun 507K X3 / 407K X3Holosun Kno known route$300–450
Holosun 508T X2Trijicon RMRno known route$300–450
Holosun 509T EnclosedHolosun 509Tno known route$450–650
Holosun EPS EnclosedHolosun Kno known route$300–450
Holosun EPS Carry EnclosedHolosun Kno known route$300–450
Holosun EPS-CORE EnclosedShield RMScno known route$300–450
Holosun SCS 320 EnclosedHolosun SCS (320)no known route$300–450
Holosun SCS Carry EnclosedHolosun Kno known route$300–450
Holosun SCS MOS EnclosedHolosun SCS (MOS)no known route$300–450
JP Enterprises JPointShield RMScno known route$150–300
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
Olight Osight KHolosun Kno known route$60–150
Olight Osight SShield RMScno known route$60–150
Primary Arms Classic 21 mm MicroShield RMScno known route$60–150
Riton 3 TACTIX MPRD 2Shield RMScno known route$150–300
Riton 3 TACTIX PRDTrijicon RMRno known route$150–300
Shield Sights RMS2Shield RMScno known route$150–300
Shield Sights RMScShield RMScno known route$150–300
SIG Sauer ROMEO-X CompactShield RMScno known route$150–300
SIG Sauer ROMEO-X ProLeupold DeltaPoint Prono known route$300–450
SIG Sauer ROMEO-X SIG-LOC Pro EnclosedSIG-LOC PROno known route$450–650
SIG Sauer ROMEO1PROSIG Romeo1Prono known route$300–450
SIG Sauer ROMEOZeroShield RMScno known route$60–150
SIG Sauer ROMEOZero EliteShield RMScno known route$150–300
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
Swampfox Sentinel IIShield RMScno known route$60–150
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 RFX35Shield RMScno known route$60–150
Viridian RFX45 EnclosedAimpoint ACROno known route$150–300
Vortex Defender-CCWShield RMScno 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 opens with this pistol already selected and gives you a single verdict for any optic, plus a build sheet with the plate SKU, screw threads, torque figures and install order. Every "how it mounts" cell above is a link to that pairing's verdict, and the address bar there is a link you can send to someone.

Something on this page wrong? Say what it should be. Corrections from someone who owns the pistol are why this is worth more than a spec sheet — and nothing here changes without a source, so bring one.