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Does the Holosun 507K X2 fit the Canik TTI Combat?

Page last updated . Data compiled September 2026 by the site administrator.

Yes, with an adapter plate: the Canik → Holosun K / EPS from Calculated Kinetics.

Adapter plate required

The slide isn't cut for this pattern. One plate adapts it, listed below. The plate supplies the recoil posts the optic sits on.

What to buy

Optic
Holosun 507K X2 ($300–450)
Plate
The Canik → Holosun K / EPS, from Calculated Kinetics ($25–60).
Screws
Use the ones that come with the plate.
Iron sights
Standard-height irons: no co-witness, typically (not a rule). Suppressor-height irons: usually a low co-witness (estimated, why).
All in
$325–510 approximate street prices, September 2026
Same answer forThe Holosun 507K X2 goes on the Canik TP9 Elite SC, Canik TP9 SFx, Canik SFx Rival / Rival-S and Canik TTI Combat Master the same way: they share this slide's optic cut.
SlideCanik optic plate system
Optic footprintHolosun K
Optic screwsper plate maker, not on file here · T10
Optic torqueper plate maker, not on file here (15 in-lb is the optic maker's figure for mounting it straight on a slide)
Plate to slideper plate instructions
Cost to mount$325–510

New to red dots? What footprint, plate, co-witness and the rest mean

Will your iron sights co-witness?With standard-height irons: No co-witness. Standard-height irons sit well below any pistol red dot window and are only usable with the optic off. Suppressor-height sights fix that; a different optic won't. Little or no data: no sight maker publishes co-witness heights for standard-height irons with this pair, so "no co-witness" is the typical case, not a rule. Some optics still show factory-height irons in the lower third or lower fifth of the window, so check your own front sight against the window before you rely on it.With suppressor-height irons: Usually a low co-witness. A plate raises the optic, so suppressor-height irons ride near the bottom of the window: Night Fision, for one, lists its .290 in front sight as a lower 1/5 co-witness with RMR-class optics on GLOCK's MOS plate. A taller plate can drop them out of view, so check the plate's deck height before ordering sights. This optic's window runs small (19.6 × 14.7 mm), so a front sight slightly off the ideal height is more likely to miss it. Estimated: no sight maker publishes heights for this pair, so that's the typical case for this kind of optic, not a guarantee: pistols don't standardize sight and optic heights the way rifles do.
How this slide mounts an opticCanik ships a multi-plate kit with most optic-ready models.
GuidesShield RMSc vs Holosun K: which optic fits which cut · Suppressor-height sights: will your irons co-witness? · Installing a red dot: what the makers say · Zeroing a red dot for the first time · Red dot lost zero? Troubleshooting the mount

What to order, and how to fit it

The fit checker's build sheet for this pair, assuming sights of unknown height. Open it in the fit checker to set your sights, work out screw length from your own caliper readings, or copy it as text.

Rather not do it yourself? Mounting an optic is a short bench job for most gun shops and gunsmiths. Buy the parts under "Parts to order" and print this page for the shop: it lists what is not on file for this pair, so they know which figures to take from the makers, and ends with a blank log for whoever does the work. How an install goes, from the makers' manuals.

Build sheet

Data compiled September 2026 · Optic Mounting
Pistol
Canik TTI Combat
Optic
Holosun 507K X2
Footprint
Holosun K
Slide
Canik optic plate system
Mount
Adapter plate required

Parts to order

1 ×Holosun 507K X2Holosun K footprint · 2 MOA + 32 MOA circle$300–450
1 ×Canik → Holosun K / EPSCalculated Kinetics$25–60
1 setSuppressor-height sights, if yours are standardMeasure your front sight first, then compare it with the sight heights published for this slide and optic, where the sheet lists them. The height that co-witnesses depends on the slide and the optic; a slim slide needs less than a full-size one.optional
Estimated total: optic + plate$325–510

Where to buy

Holosun 507K X2Holosun K footprintHolosun — this item ↗
Canik → Holosun K / EPSCalculated KineticsCalculated Kinetics — this item ↗
Suppressor-height sights, if yours are standardOptional, for a co-witness. Makers include Trijicon, Ameriglo, XS and Dawson

Fasteners: which bag

You don't buy these. Screws come with the pistol, the optic and the plate, and they look alike. The thread is tapped into the slide or plate (the optic only has a clearance hole), so they decide the thread, not the optic.

JointThreadComes from
Plate → slideper plate maker, not on file hereSupplied with the plate.
If your pistol shipped with a cover plate, keep its screws apart from these: plate screws and cover-plate screws are different lengths.
Optic → plateper plate maker, not on file hereSupplied with the plate, not the optic.
Most mistakes happen here. The screws in the optic's box are cut for mounting straight onto a slide; a plate changes the stack, so the plate maker supplies the right pair. If your plate came without screws, measure before you buy.

On the bench before you start

  • Torque wrench — set to the figure in your optic's manual
  • Driver bits — T10, fully seated so they don't round the head
  • Calipers — for the screw length check below
  • Blue removable threadlocker — Vibra-Tite VC-3 or Loctite 242. Never red.
  • Degreaser — isopropyl or brake cleaner
  • A parts tray — you'll have three bags of look-alike screws
  • Witness-mark paint or lacquer — so you can see if anything moves later

Install spec

Plate to slideper plate instructions
Optic torqueper plate maker, not on file here (15 in-lb is the optic maker's figure for mounting it straight on a slide)
Screwsper plate maker, not on file here
DriverT10
Interface2 screws, 2 forward lugs (rear posts omitted)

Not on file for this build

Where a figure is not published, this sheet says so instead of guessing. Get these from the maker or your gunsmith.

Plate → slide thread
Not published where this site could find it. Ask the plate maker, or check the screw bag's label.
Optic → plate thread
Not published where this site could find it. Ask the plate maker, or check the screw bag's label.
Optic screw torque
Not published for this plate. Use the plate maker's figure, not the optic maker's, which is for a slide.
Screw length
Never published here, because it depends on your exact stack. Measure it and test-fit dry.

Sequence

  1. Clear the pistol. Drop the magazine, lock the slide back, look and feel the chamber, then do it again.
  2. Remove the factory cover plate and set its screws aside. They are not optic screws.
  3. Degrease the slide pocket, both faces of the plate and the optic base. Oil under a plate lets it move.
  4. Seat the plate on the slide, check it sits flat with no rock, and fit its screws with blue threadlocker.
  5. Torque the plate to spec, bringing the screws up evenly rather than one at a time.
  6. Seat the optic on the plate's recoil posts, fit the optic screws with blue threadlocker, and torque to the optic spec.
  7. Let the threadlocker cure before firing (check the bottle; usually a few hours to overnight).
  8. Confirm zero at your working distance, then re-check torque after the first 100–200 rounds.

Before you fire it

  • Screw length checked dry: it must not bottom out on the slide or reach the striker channel.
  • Optic sits flat with no rock, and the screws pulled up evenly.
  • Torque set with a wrench, not by feel. Witness-mark the screws so movement is visible later.
  • Threadlocker cured.
  • Function check, then zero confirmed live.

Screw length is the one that hurts

Too long and a screw bottoms out on the slide or reaches the striker channel; too short and it strips under recoil. This sheet gives the thread but can't give the length, which depends on your exact plate and optic stack. Test-fit dry and count threads.

Shop log (fill in)

Torque wrench, and setting 
Plate screws: thread, length, torque 
Optic screws: thread, length, torque 
Threadlocker used (product, or none) 
Witness marks applied 
Zeroed at (distance, ammunition) 
Torque re-checked after (rounds) 
Fitted by, and date 

Sight co-witness

Confirm the firearm is unloaded before any work on the slide. Mounting an optic is gunsmithing: stay within your competence and use a gunsmith when a job is past it. Provided as-is with no warranty; you use this at your own risk. Prices are approximate street-price bands from September 2026. Torque and fitment figures come from manufacturer documentation; confirm against the current manuals for your pistol, optic and plate before installing. Not affiliated with or endorsed by any manufacturer.

The Canik TTI Combat with other optics

Plate in box7

Plate4

No fit2

Every optic on the Canik TTI Combat, and how each mounts

The Holosun 507K X2 on other pistols

Direct (cross-fit)7

Plate20

No fit3

Every pistol the Holosun 507K X2 fits

Sources for this page (2)

Data compiled September 2026 from these documents. A figure with no source here is marked "not on file" on the page. How the data is checked.

Last checked against the makers’ documents. The Holosun 507K X2: window, weight and dot checked against the maker's own spec sheet or manual on September 26, 2026. Not individually re-checked since it was compiled (September 2026): the slide’s data and the plate.

Something on this page wrong? Tell us what it should be, and include a source: nothing changes without one.