SIG XRAY5: A Pistol Dot With No Moving Zero

Nearly every pistol red dot zeroes the same way. You turn a screw, a carrier holding the emitter physically moves, and springs hold it where you left it. Then the slide stops and reverses direction a few hundred times and those parts have to not move.

The XRAY5 deletes that entire mechanism. Its emitters are a fixed grid of 225 LEDs arranged 15 across and 15 high, and zeroing means telling the sight which LED to light up. Windage and elevation inputs move the dot without moving any hardware.

Before anything else: there is no photograph of this optic. SIG has no product page for it, and searching sigsauer.com for XRAY5 returns nothing. What exists is a deliberately blurred pistol on SIG's homepage countdown wearing something that looks like it, four dealer records with part numbers, and one retailer listing for an XRAY5 and FOXTROT2R combo that a forum member turned up this week. Everything below comes from those records, from SIG's own patent language, and from our own price and pick data.

No photograph of the XRAY5 exists yet, so this is the mechanism, drawn from SIG's own patent language. Schematic, not to scale.

Why removing the carrier matters

SIG's own patent language is unusually blunt about the problem it set out to solve. It describes conventional carrier plates as tolerance sensitive parts that can wear, break, shift under shock, and produce uneven travel or dead adjustment clicks. Anyone who has chased a zero that would not stay has met that failure mode.

Selecting a different fixed emitter takes the carrier out of the zero path entirely. That also makes saved zero profiles practical in a way they are not on a mechanical sight, because the sight can return to a known coordinate on the grid rather than to a physical position it has to remember.

Whether the complete optic is tougher than an established enclosed dot is a separate question, and it needs recoil testing on production units. The claim that holds up on the drawings is narrower: the zero no longer depends on a carrier staying put.

The number SIG has not published

225 aiming points sounds like a lot. What matters is the spacing between adjacent LEDs, because that is your click value. A centered 15 position axis gives seven moves in either direction. At half a minute of angle per move that is roughly three and a half minutes of adjustment each way, which is not much for a pistol with a slide cut that is slightly off. At a full minute per move it is about seven minutes each way. At four minutes per move you get useful range and lose the ability to make fine corrections.

Those are illustrations, not specifications. SIG's patent explicitly allows uneven spacing, which would let fine steps sit near the center and coarser corrections sit near the edges. That would be a sensible design. It also has not been confirmed for the production sight.

What our own data says about a 600 dollar SIG optic

This is the part we can answer that nobody else can. We record which optic a builder actually commits to and what it costs at the moment they pick it, not what it lists for.

Across the last 90 days the optic slot took 3,135 picks from 2,526 sessions, and the median price at the moment of selection was 464 dollars. SIG is the third most picked optic brand on the site at 14.1 percent of those picks, behind EOTech and Vortex.

Then look at what SIG picks actually are. The median SIG optic selected here goes for 239 dollars, and the ten most picked SIG optics are, in order, Romeo 5 variants, a Romeo 5 with a magnifier, a Romeo 7 and a Romeo 8T. Every one. On this site SIG is the value brand, chosen at roughly half what the average optic buyer spends and a quarter of what someone reaching for Trijicon or Aimpoint pays.

That is the commercial question hanging over the XRAY5, and it has nothing to do with the engineering. The dealer preloads put it between 500 and 600 dollars. SIG sells plenty of optics to our audience, but not at that number.

You can buy into SIG-LOC today

That 18 product shelf matters for a second reason. SIG-LOC gets written about as if it were unreleased, because it is the interface named for the unannounced P385. It is not. The Romeo-X line ships with it now, in both Compact and PRO sizes, and those are the sights that will already fit a SIG-LOC cut whenever one arrives.

Sig Sauer

SIG Sauer Romeo-X SIG-LOC Compact Red Dot Sight Red 3 MOA Dot Reticle Black

In stock

$529.99 at BrownellsCompare 6 stores+ Add to build

Sig Sauer

SIG Sauer Electro-Optics SORX1530 Romeo-X SIG-Loc PRO Black Cerakote 1x 3 MOA Red Dot Reticle

In stock

$579.99 at BrownellsCompare 5 stores+ Add to build

Sig Sauer

SIG Sauer Romeo-X SIG-LOC Compact Red Dot Sight Red 6 MOA Dot Reticle Black

In stock

$529.99 at Palmetto State ArmoryCompare 6 stores+ Add to build

Prices there are the best in stock offer across our merchant feeds today, not manufacturer suggested retail, and they move.

Four versions, and the footprint trap

Dealer systems have loaded four separate records with their own part numbers and barcodes, which is how the lineup became public. Two mount conventionally on top of the slide, on a DeltaPoint pattern cut and a Shield pattern cut respectively. Two use SIG's underside mounted SIG-LOC system, in PRO and Compact sizes.

Early dealer prices put the conventional Compact around five hundred dollars, the conventional PRO and the SIG-LOC Compact around five fifty, and the SIG-LOC PRO around six hundred. Two bundles pairing a conventional sight with a weapon light sit above those. Every one of those numbers is a preload value rather than a SIG published price, so use them for positioning and not for budgeting.

The trap is the footprint. A DeltaPoint pattern cut, a Shield pattern cut and an underside mounted SIG-LOC system are three different interfaces. They are not interchangeable, and choosing by housing size is how people end up with a sight that does not bolt to their slide. The SIG-LOC PRO record also lists a pistol SIG has not announced, which is covered in what we know about the SIG P385.

What the forums make of it

The reaction on SIG Talk since the lineup surfaced splits cleanly, and the split is not about the optics.

The enthusiasm is for the feature list. One longtime member called the digital zeroing, the battery gauge and the round counter "pretty impressive," another said he expects the same technology to reach rifle optics, and a third reported that a rifle version was demonstrated at SHOT Show earlier this year. When a retailer listing for the XRAY5 and FOXTROT2R combo appeared this week, the thread's reaction was relief at the price rather than sticker shock.

The objection is the phone. "I have no desire for an optic that requires an app to operate," one member wrote, "I'll stick with mechanical windage and elevation adjustments." That view is worth taking seriously on a duty sight, and it is also worth checking against the spec, which is what the next section does.

The app, and what it does not control

The XRAY5 pairs to a phone app that saves and names multiple zero profiles, tracks a round count from the optic's accelerometer, and exposes brightness, motion activation, auto off timing and lockout. The round counter needs a five shot calibration so it can learn the recoil signature of the host pistol, and SIG says to recalibrate when the optic moves to another gun. It is a recoil event estimate, not a record of rounds through the chamber.

The important detail is what the phone is not. Power, brightness, windage, elevation and lockout all remain available from the two buttons on the optic itself. The app is an extra control surface rather than a requirement, which is the right way to build this, and it is the direct answer to the objection above.

If what you want is a sealed dot, that is already solved

If your reason for wanting the XRAY5 is the digital zero, there is nothing to buy instead, because nothing else on the shelf works that way. If your reason is that you want a sealed pistol dot that will not lose its dot to weather or pocket lint, that problem is solved, and has been for a while.

An enclosed emitter puts a rear window behind the optical path so nothing can land between the LED and the lens. That is the failure mode that actually removes open emitter sights from service, and it is why duty and carry guns keep moving toward enclosed housings.

Aimpoint

Aimpoint ACRO P-2 Red Dot Reflex Sight 3.5 MOA Dot

In stock

$599.00 at Sportsman's GuideCompare 10 stores+ Add to build

Holosun

Holosun EPS Carry Enclosed Pistol Reflex Red Dot Sight 1x Red 2 MOA Dot Reticle Battery Powered Matte Black

In stock

$329.99 at BrownellsCompare 12 stores+ Add to build

Steiner

Steiner MPS Battle Sight 1x20x16mm 3.3 MOA Dot - 8700MPS

In stock

$316.74 at MidwayUSACompare 12 stores+ Add to build

All three mount to footprints that have been stable for years, which means they are still the right purchase for the pistol you own now regardless of what SIG ships later.

If the gun you are mounting to is a carry sized slide rather than a duty slide, the smaller footprints are worth looking at before you size up to a full PRO housing.

Holosun

Holosun HE507C-GR X2 Pistol Green Dot Sight - 2 MOA

In stock

$255.99 at Palmetto State ArmoryCompare 12 stores+ Add to build

Holosun

Holosun 1x Micro Red Dot Sight - HS507K-X2

In stock

$260.47 at Sportsman's GuideCompare 13 stores+ Add to build

The paper trail

What to watch on Wednesday

SIG's countdown runs out on September 23, and the teaser pistol is wearing an optic that matches this housing paired with a FOXTROT2R light. Whatever else is on that stage, the XRAY5 is the most likely thing on top of it.

Three numbers decide whether this is a serious duty optic or an interesting one. The click value and total adjustment range, which decide whether it will zero on your slide. The battery type and life, because a sight that holds 225 emitters and a radio has a power budget a simple dot does not. And the real price, because 500 dollars buys a Romeo-X SIG-LOC today and around 580 buys the PRO.

The design is genuinely new, which is rare in pistol optics. That is a reason to pay attention and not a reason to buy on preorder.