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The 1911 has been the gold standard of single-action pistols for well over a century, and Sig Sauer's 1911 X-Full makes a strong case that the platform still has plenty of room to grow. This is a full-size, 5-inch government-frame pistol chambered in .45 ACP, built entirely from stainless steel and finished with a bead-blast treatment that gives it that clean, classic look without being flashy about it. Where it gets interesting is everything Sig packed into the package on top of that traditional foundation.
The slide features a direct-mount optic cut using the Shield RMSc footprint, which keeps the optic sitting low enough that co-witness with the XRAY3 day/night sights is still possible. Those XRAY3 sights are legitimately excellent on their own — bright, fast, and easy to pick up regardless of lighting conditions — so even if you run this pistol without a red dot, you're not giving anything up in the sight department. The slide also includes front and rear X-Series serrations that give you positive purchase when you need to run the gun quickly.
Grip control is handled really well here. The custom G10 panels from LOK Grips are aggressively textured and lock the gun into your hand, which matters when you're running a full-weight steel .45 ACP at pace. The checkered front strap adds to that, and the undercut trigger guard lets you get a high, consistent grip. Sig also included a removable metal magwell that flares the opening and makes reloads noticeably faster. Rounding out the controls are the extended ambidextrous thumb safety and slide release, both well-positioned and easy to work without breaking your grip.
The flat-faced adjustable trigger is one of this pistol's standout features. The break is clean and crisp with a predictable reset — everything you expect from a quality 1911 trigger out of the box without the need for a gunsmith visit. It measured around 4 pounds in testing by multiple sources, which is right in that sweet spot of light enough for precise work but not so light it creates any handling concerns. That single-action trigger feel is a big part of why people keep coming back to this platform, and Sig nails it here.
The frame carries an M1913 Picatinny rail for lights or lasers, the beavertail grip safety is well-executed, and the whole package ships with two 8-round steel magazines ready to go.
The slide is cut to the Shield RMSc footprint for direct, ultra-low-profile mounting of compact red dot optics. This keeps the optic sitting low enough to co-witness with the XRAY3 day/night sights that come installed from the factory. Sig also includes two mounting screws in the box for direct-mounting their Romeo-X red dot or any compatible RMSc-footprint optic.
Yes, it ships with Sig's XRAY3 day/night sights installed. These are P-Series sights with tritium inserts and a large, easy-to-acquire front sight that works well in low light without needing a flashlight. They function as your primary sighting system whether or not you choose to add a red dot.
Yes, the Sig Sauer 1911 X-Full uses a Series 80-style internal firing pin safety, which makes it drop-safe beyond just the grip safety and thumb safety. It also features an external extractor rather than the traditional internal extractor design common on older 1911s, which is part of how Sig has updated the platform internally.
The flat-blade adjustable trigger breaks right around 4 pounds, which has been consistent across multiple hands-on range tests. The break is crisp and clean with a short, positive reset — very much in line with what you expect from a quality production 1911. It does not require any aftermarket work to perform well out of the box.
The metal magwell is removable, so if you have a holster that doesn't fit with it installed you can pull it off without affecting the function of the pistol. With it on, it does add a slight flare to the grip base that speeds up reloads noticeably. Most 1911 government-frame holsters will fit this pistol, but it is worth confirming with your holster manufacturer given the added rail and optic cut on the slide.
The core features are identical — same optic cut, same XRAY3 sights, same LOK Grips G10 panels, same controls and trigger. The main difference is that the stainless model (1911XR-45-SS) uses a bead-blast stainless finish on both the frame and slide, giving it the classic silver look, while the black model uses a DLC (Diamond-Like Carbon) coating for a darker, matte appearance. The stainless finish is durable and corrosion-resistant, though it will show handling wear over time more visibly than a DLC-coated gun.
| UPC | 798681695362 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 1911XR-45-SS |
| Action | |
| ATF Type | Pistol |
| Barrel Length | 5" |
| Caliber/Gauge | .45 ACP |
| Capacity | 8 + 1 |
| Color | Stainless |
| Length | 13.5500 |
| Magazine Included | 2 x 8-Round |
| Model | |
| Number of Magazines | 2 8 rd. |
| Package Height | 3.0 |
| Package Width | 9.5 |
| Product Type | Semi-Auto Pistol |
| Safety | Ambidextrous Lever |
| Shipping Weight | 4.25 |
| Sights | XRAY3 Day/Night Sights |
| Sights Type | Night Sights |
| Slide Description | Optic Ready/Serrated |
| State Restriction (CA) | NO DIRECT SHIP TO CALIFORNIA |
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