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 have to hold it there while the slide slams back and forth a few hundred times.

The SIG Sauer XRAY5 deletes that whole mechanism. Its emitters are a fixed grid of 225 LEDs, 15 across and 15 high, and zeroing it means telling the sight which LED to light, so your windage and elevation inputs move the dot without moving any hardware.

SIG announced it on September 22, 2026, alongside the P385 pistol. All four versions are on sigsauer.com at $499.99 to $599.99, every one of them shows out of stock, and SIG still hasn't given a ship date for the optic.

What to buy now if you can't wait for the XRAY5

Nothing else on the shelf zeroes digitally, so there's no true substitute. If you need a sealed dot on your slide this month, these four are enclosed dots for the same slides, and you can order them today.

Best for the P385: Romeo-X SIG-LOC PRO, about $580.

Best for a SIG-LOC P365: Romeo-X SIG-LOC Compact, about $530.

Best for a Shield RMSc slide: Holosun EPS Carry, about $330.

Best to leave switched on: Aimpoint ACRO P-2, about $600.

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 3 MOA Dot Reticle Black

In stock

$529.99 at BrownellsCompare 6 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

Aimpoint

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

In stock

$599.00 at Sportsman's GuideCompare 11 stores+ Add to build

Romeo-X SIG-LOC PRO: best for the P385

Every P385 slide is cut for SIG-LOC PRO, and the Romeo-X is the SIG-LOC PRO dot you can actually buy. It mounts from underneath the slide on the same interface as the XRAY5 SIG-LOC PRO, so it'll fit the day your pistol arrives.

What we like

• SIG says the SIG-LOC footprint makes five points of contact with the slide to keep recoil from shifting your zero.
• It runs about $20 under the XRAY5 SIG-LOC PRO's $599.99 list price, and several of our merchants have it in stock.

Watch out for

• It fits SIG-LOC PRO slides only, so a DeltaPoint PRO or Shield RMSc cut won't take it.
• You zero it the conventional way, so it holds one zero at a time with no saved profiles.

Romeo-X SIG-LOC Compact: best for a SIG-LOC P365

SIG lists the XRAY5 SIG-LOC COMPACT for recent SIG-LOC versions of the P365, and the Romeo-X SIG-LOC Compact uses that same smaller interface. It costs about $20 less than the XRAY5 version and ships now.

What we like

• SIG's listing gives it 15 brightness settings, three of them for night vision, and a side loading battery rated to 20,000 hours.
• You get MOTAC motion activation and a fully enclosed, sealed optical system in a 7075 aluminum housing.

Watch out for

• SIG's listing still names the P365-FUSE as the only compatible slide, so confirm your P365 is a SIG-LOC version before you order.

Holosun EPS Carry: best for a Shield RMSc slide

The EPS Carry is an enclosed dot built for the narrow carry slides the XRAY5 COMPACT targets. It costs about $170 less than the XRAY5 COMPACT, and Holosun names the G43 MOS, G48 MOS, Hellcat and P365 X and XL among the pistols it fits.

What we like

• A solar panel backs a side mounted CR1620 battery that Holosun rates up to 50,000 hours, with Shake Awake to save power.
• Holosun adds a built in rear notch and a dot low enough to work with most factory iron sights.

Watch out for

• It uses Holosun's K footprint, and the RMSc plate in the box is made for RMSc slides with rear recoil posts, such as the Glock 43X and 48 MOS.

Aimpoint ACRO P-2: best to leave switched on

The ACRO P-2 is the enclosed dot Aimpoint built for the beating a pistol slide takes, and it runs on the same CR2032 cell as the XRAY5.

What we like

• Aimpoint rates the battery for over five years of constant on use, so you can leave it on.
• Aimpoint says it tested the P-2 past 20,000 rounds of .40 S&W.

Watch out for

• At about $600 it costs as much as the most expensive XRAY5, the SIG-LOC PRO.
• Check your slide cut or plate before you order, the same way you would for the XRAY5.

What SIG published about the XRAY5 at launch

The mechanism, drawn from SIG's own patent language. Schematic, not to scale.

The range, battery, window and brightness figures come from retailer spec sheets that repeat SIG's own, so treat them as SIG's numbers passed along secondhand. The XRAY5 is rated IPX8, waterproof to 40 meters.

One retailer also lists weights with the battery in: 1.45 oz for the PRO and 1.35 oz for the Compact. We haven't seen those figures anywhere else yet.

SIG XRAY5 price, and where it's for sale

SIG sells the XRAY5 direct at four prices, one for each footprint.

The conventional COMPACT is the cheapest at $499.99. The PRO and the SIG-LOC COMPACT both list at $549.99, and the SIG-LOC PRO tops the range at $599.99. RECOIL's launch writeup, which Gun Digest also runs, says "prices start at $499."

Want SIG's FOXTROT2R weapon light too? SIG bundles it only with the two conventional versions, at $649.99 for the COMPACT combo and $699.99 for the PRO combo, and there's no SIG-LOC combo.

You can't get one yet. SIG's store lists every version as out of stock, Atomic Defense shows the same four prices with three versions backordered and the COMPACT sold out, and KYGunCo lists the SIG-LOC COMPACT at $549.99, out of stock.

The XRAY5 isn't in our catalog yet, so we can't put a live price card for it on this page. Every card here is a SIG-LOC or enclosed dot you can order today.

Which XRAY5 fits your pistol?

Pick the version by the cut in your slide. Housing size won't tell you, because the four versions use four different interfaces and none of them cross over.

SIG names them plainly. The PRO is a traditional top mount on the DeltaPoint PRO (DPP) footprint, and the COMPACT is a traditional top mount on the Shield RMSc footprint. SIG's own product pages call these two the ENCLOSED PRO and ENCLOSED COMPACT.

The other two mount from underneath the slide on SIG's SIG-LOC system. SIG lists the SIG-LOC PRO for the P211 and P385, plus recent SIG-LOC versions of the P320 and P226X, and the SIG-LOC COMPACT for recent SIG-LOC versions of the P365.

Pick your slide in the chart and every row tells you whether it bolts on, in SIG's words. We left out Glock slides, older P365s and adapter plates on purpose, because SIG publishes no XRAY5 compatibility for any of them and the claims you'll see online come from third party sites.

The P385 is the pistol most people are buying this for. SIG unveiled it in five models, and every slide has a SIG-LOC PRO optic cut. We cover the models, prices and what else fits in what we know about the SIG P385.

Why does removing the carrier matter?

SIG's own patent language is unusually blunt about the problem it set out to solve. Its emitter array patent (US 12,247,808) describes conventional carrier plates as tight tolerance parts that wear, break and move when a gun is dropped.

The same patent blames them for nonlinear travel and dead clicks. Anyone who has chased a zero that wouldn't stay put has met that failure.

Selecting a different fixed emitter takes the carrier out of the zero path entirely. Saved zero profiles become practical too, since the sight returns to a known coordinate on the grid instead of 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: your zero no longer depends on a carrier staying put.

The number SIG still hasn't published

The total travel is out. Retailer spec sheets copying SIG's list 80 MOA of windage and 80 MOA of elevation, so centered you'd have about 40 MOA each way, plenty for a slide cut that's slightly off.

The step size is still missing. It's the angle between one emitter and the next, and it works as your click value.

The range doesn't settle it. Spread 80 MOA evenly across 15 emitters and each step comes out around 5.7 MOA by our arithmetic, coarser than the 3.5 MOA dot itself. SIG's patent says the emitters needn't be evenly spaced, and the ones near the edges can sit closer together or further apart, but SIG hasn't said which layout the production sight uses.

What our own data says about a 600 dollar SIG optic

We record which optic a builder commits to and what it cost at the moment they picked it. Every pick below went into the optic slot of an AR build, and nearly all of them are rifle optics, so read this as how our audience spends on SIG glass in general rather than on pistol dots.

Over the window in the chart, the median optic picked here cost $469.99 at the moment of selection. SIG was the third most picked optic brand at 14.3 percent of all picks, behind EOTech and Vortex.

The median SIG optic picked here costs $238.99. On this site SIG is the value brand, picked at about half the price of the typical optic pick.

Every XRAY5 sits between $499 and $600, and only 14.0 percent of priced optic picks landed in that band. SIG sells plenty of optics to our audience, just not at that price.

Can you buy into SIG-LOC today?

Yes. SIG-LOC didn't arrive with the P385, and the Romeo-X line already uses it in both Compact and PRO sizes. We also price Trijicon RMR kits made for SIG-LOC slides.

The Romeo-X SIG-LOC Compact also comes with a 6 MOA dot if you'd rather have a bigger dot.

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

Want a sealed dot now? These fit other slides

An enclosed emitter puts a rear window behind the optical path, so nothing can land between the LED and the lens. On an open emitter sight, lint or rain on the LED can block the dot.

Mounting to a carry sized slide with a Shield RMSc cut, the one the XRAY5 COMPACT takes? Vortex built the Defender-CCW Enclosed on the Shield RMS footprint. The Holosun EPS Carry also comes with a 6 MOA dot, and Steiner lists its enclosed MPS as fitting all Docter base plates.

Vortex Optics

Vortex Defender-CCW Enclosed Solar 3 MOA Red Dot Sight

In stock

$299.99 at AR15 DiscountsCompare 2 stores+ Add to build

Holosun

Holosun EPS Carry Enclosed Pistol Reflex Red Dot Sight 1x Red 6 MOA Dot Reticle Battery Powered Matte Black

In stock

$329.99 at Sportsman's GuideCompare 11 stores+ Add to build

Steiner

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

In stock

$299.99 at Palmetto State ArmoryCompare 12 stores+ Add to build

None of these needs an app. Check your slide cut or plate first, the same way you would for the XRAY5.

What does the XRAY5 app control?

Don't want to zero a pistol with your phone? You don't have to.

The XRAY5 pairs to a phone app that saves and recalls multiple zero profiles and keeps a round count from the optic's accelerometer. SIG also lists MOTAC motion activation, auto off settings and a battery indicator among the app's controls.

The round counter needs a five round calibration so it can learn the recoil signature of the host pistol, and SIG says you can recalibrate or reset it when the optic moves to another gun. Treat the count as an estimate of recoil events, because it won't match rounds through the chamber exactly.

LightFight pairs the dot with SIG's FOXTROT2R light. Turn the light on and the dot gets brighter on its own.

SIG says adjustments work from either the app or the two control buttons on the optic, and Soldier Systems' launch writeup confirms you can still use the side buttons for brightness and zero.

How the XRAY5 went from leak to launch

Four versions showed up in dealer records before SIG announced anything, and we reported them on September 19. Here's every dated step and who it came from.

What's still open about the XRAY5?

Launch answered the price and the footprints. Three things are still open.

The step size. The 80 MOA range tells you how far the dot travels, but it doesn't tell you how fine each move is, and that decides whether you can zero precisely.

The ship date. SIG hasn't given one for the optic on its own. The P385 is due in stores this fall and early winter, and SIG launched the two together.

Independent testing. Per Soldier Systems, SIG says the XRAY5 went past 100,000 rounds without failure, survived repeated 8 foot drops onto concrete, and held zero after submersion to 132 feet. SIG ran those tests itself, and we haven't found independent recoil testing on a production unit yet, so we'd wait for it before carrying one.

How we pick

We pick alternatives by footprint first: each one is an enclosed dot for the same kind of slide the XRAY5 targets, in stock across our merchant feeds when this page was updated. Specs and pros come from the maker's listing, XRAY5 facts come from SIG's launch material and SIG sourced retailer sheets, and we checked every XRAY5 price against a retailer page we could open.