Sig Sauer 1911 X-Series Full Size 45 ACP Pistol – Superb 5in Barrel, Optic Ready, Rail

Description

The Sig Sauer 1911 X-Series Full Size is what a 45 ACP 1911 looks like when it is built for optics and lights instead of being retrofitted for them. A 5-inch black DLC barrel sits under a bead-blasted stainless slide cut for a Shield RMSc footprint red dot, the frame carries a Picatinny rail and a high beavertail, and LOK G10 grips give you texture that works wet.

What the X-Series Adds to the Sig Sauer 1911 X-Series Full Size

SIG’s X-Series is the company’s answer to the question of what a 1911 should look like after a century of refinement. The frame carries a Picatinny rail and a high beavertail, the slide is cut for a micro red dot, and LOK G10 grips replace wood or rubber with a material that holds texture in any weather. The result is a 1911 you can mount a light and a dot on without sending it to a gunsmith.

Everything a 1911 shooter expects is still there: a single action trigger, a grip safety, a thumb safety and a manual of arms that has not changed since 1911.

Barrel, Slide and Optic Mounting

The 5-inch barrel is finished in black DLC over carbon steel, a hard coating that resists wear at the locking surfaces and the bushing. The bead-blasted stainless slide is serrated front and rear and cut for a Shield RMSc footprint optic, which is the most common micro red dot pattern in production \u2014 a Romeo Zero, Holosun 507K or SIG ROMEO-X Compact all fit. Iron sights are installed underneath.

Trigger, Safeties and Controls

The single action trigger is the reason people buy 1911s. There is no first-shot difference to train around, the reset is short, and the break is the cleanest thing in a production handgun. A grip safety and a thumb safety mean the pistol carries cocked and locked the way John Browning intended, and the X-Series controls are sized for adult hands and gloves.

Sig Sauer 1911 X-Series Full Size Specifications

Who the Sig Sauer 1911 X-Series Full Size Suits

This is a range and competition pistol first, and a home-defense gun for anyone who already shoots a 1911 well. The full-size frame and 5-inch barrel give you the classic sight radius and the classic weight, and the optic cut means you are not choosing between a traditional platform and a modern sighting system. Shooters new to 1911s should plan on learning the manual of arms.

Shooting the Sig Sauer 1911 X-Series Full Size

A steel-framed .45 is a heavy pistol, and that weight is the point: recoil comes back as a push rather than a snap, and the muzzle returns to where it started without much help from you. Shooters who find .45 uncomfortable in a polymer gun usually find it easy in a 1911. Eight rounds in the magazine means more reloads than a double stack, which is the trade you make for the trigger.

Accuracy at typical handgun distance is limited by the shooter, not the gun. That is the reputation the platform earned and the X-Series does nothing to spoil it.

Holsters, Lights and Magazines

Holsters cut for a rail-equipped 1911 fit, and an optic-ready model is worth ordering if you plan to mount a dot. The Picatinny rail accepts a Streamlight TLR-1 or SureFire X300 directly. Magazines are standard 1911 .45 ACP pattern — SIG, Wilson Combat and Chip McCormick all work — so spares are easy to find and inexpensive.

Care and Long-Term Ownership

A 1911 likes to be oiled on the rails and the barrel bushing area, more so than a modern striker gun. Clean it normally and keep a light film where steel slides on steel and it will run indefinitely. Recoil springs are the wear item; replace them every few thousand rounds.

The finishes on the X-Series are hard coatings over stainless, so solvents are fine and corrosion resistance is better than a blued gun. Keep the box, both magazines and the paperwork together if resale matters to you.

Ordering and FFL Transfer

We ship to your local FFL after we receive a copy of their license. If you have a preferred dealer, tell us at checkout and we will coordinate directly with them. Pennsylvania buyers can complete the transfer with us in Collegeville.

Every firearm we ship leaves our Collegeville, Pennsylvania shop through a licensed FFL dealer and must be transferred to you by an FFL in your state. Questions about fit, holsters or optics? Call or email us before you order and we will make sure the gun matches what you actually need. are listed in our handguns. Factory specifications are published by SIG Sauer.

Every Sig Sauer 1911 X-Series Full Size sold by MAG5 Firearms ships new in the factory packaging with the accessories SIG Sauer includes, and transfers to your chosen FFL. The Sig Sauer 1911 X-Series Full Size is a regulated firearm and we verify licensing before any order leaves the shop.