Sig Sauer 1911XR-45-SS 1911 Full Size Frame 45 ACP 8+1 5" Optic Ready/Serrated Stainless Steel Slide & Frame w/Beavertail & Picatinny Rail

The Sig Sauer 1911XR-45-SS is a modern take on the full-size 1911 platform built for shooters who want classic lines with contemporary optics capability. Chambered in 45 ACP with an 8+1 capacity, this stainless steel 1911 strips away nostalgia and adds practical upgrades: an optic-ready slide milled for compact direct-mount red dot sights, XRAY3 day/night sights for low-light performance, and a railed stainless frame ready for tactical accessories. Whether you're a dedicated 1911 enthusiast looking to modernize your carry gun or a competitive shooter seeking reliable .45 ACP performance with optics flexibility, the XR-45-SS delivers proven ergonomics and updated fighting features in a 5-inch barrel platform.

Sig engineered this pistol around real-world carry and duty expectations. The stainless bead-blast finish resists corrosion, the flat serrated trigger offers crisp, consistent breaks, and custom G10 grips from LOK provide confident purchase in any condition. An ambidextrous thumb safety, extended slide release, and undercut triggerguard (beavertail) round out the ergonomic package. You get two 8-round steel magazines and a compact optic footprint rated for Shield RMS-c class mounts—keeping your profile low while delivering the sight-picture advantages of a red dot.

The 5-inch carbon-steel barrel with DLC finish pairs with a 6.5-inch sight radius, balancing accuracy and speed for defensive work. At 42.1 ounces loaded, the XR-45-SS sits in the sweet spot for all-day carry without sacrificing .45 ACP terminal ballistics. This is a 1911 for the shooter who respects tradition but refuses to compromise on modern capability.

Key Features

• Optic-ready slide with compact footprint (Shield RMS-c compatible) for ultra-low-profile red dot mounting
• XRAY3 day/night sights integrated for enhanced visibility in variable light
• Stainless steel slide and frame, bead-blast finished for durability and corrosion resistance
• Custom G10 LOK grips in black for secure, all-weather handling
• Flat serrated trigger delivers crisp single-action breaks
• Ambidextrous thumb safety and extended slide release for left and right-hand operation
• M1913 Picatinny rail for tactical light or laser mounting
• Includes (2) 8-round steel magazines
• Carbon-steel barrel with black DLC finish resists wear and corrosion
• Undercut triggerguard (beavertail) for high grip seating

Specifications

Frequently Asked Questions

What red dot sight fits the Sig Sauer 1911XR-45-SS?

The slide is milled and optic-ready for compact direct-mount red dots using the Shield RMS-c footprint. This includes optics like the Sig Romeo Zero, Holosun HS407K/HS507K series, and similar compact enclosed-emitter designs. The stainless optic sight plate is included; no additional mounting hardware is needed for compatible sights.

Is the 1911XR-45-SS suitable for concealed carry?

Yes. At 42.1 ounces loaded and 8.7 inches overall length, this full-size 1911 can be carried concealed by shooters comfortable with that weight and footprint. The stainless construction adds durability for daily carry, and the ambidextrous safety and ergonomic grip panels support draw and manipulation from strong or support hand.

Can I add a weapon light or laser to this pistol?

Yes. The M1913 Picatinny rail built into the stainless steel frame accepts tactical lights and lasers rated for 1911 platforms.

What magazines are included?

The XR-45-SS comes with two 8-round steel magazines.