Sig Sauer 1911 Full-Size: Ergonomic .45 ACP for All-Purpose Use

The 1911 platform has been a cornerstone of modern handgun design for over a century. Its single-action ergonomics, clean trigger break and intuitive controls make it a go-to choice for shooters who value precision, reliability and a tactile connection to their firearm. In this review we examine how SIG has updated that classic formula for today’s users without losing what made the original great.

SIG SAUER 1911 STX FULL-SIZE

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What the SIG SAUER 1911 STX FULL-SIZE brings to the table

The 1911 STX Full-Size blends traditional 1911 lines with modern refinements from the SIG SAUER Custom Shop. It’s an all-metal pistol with a Nitron slide over a Natural Stainless frame, polished cocking serrations and a Flat Top slide that gives the pistol a purposeful, two-tone appearance. The frame is hand-fitted to the slide and finished with de-horning for comfortable carry and handling.

Key features highlighted

The STX includes adjustable combat night sights up top and a machined Magwell at the frame for faster, more consistent reloads. Internally, SIG fits match-grade components: barrel, hammer, sear set and a crisp single-action-only trigger targeted at a 5 lb pull. Safety systems include a beavertail grip safety with a speed bump, extended ambidextrous thumb safety, firing pin safety and a hammer intercept notch — a complete package for safe, confident operation.

Ergonomics and controls

The ergonomics are classic 1911 but refined. The STX front strap has 25-line per inch checkering and the mainspring housing carries 20-line per inch checkering for a secure purchase in varied conditions. Burled maple grips add a touch of traditional styling while the de-horned edges and beavertail reduce hot spots under recoil. At 41.6 oz loaded and an overall length of 8.7 inches with a 5.0-inch barrel, the Full-Size frame balances recoil management with sight radius for precision shooting.

Caliber options and applications

One of the STX’s strengths is its chambering flexibility. SIG lists available chamberings including 9mm, 10mm, .45 ACP and .357 SIG. Each caliber has clear benefits: 9mm for higher capacity and lower recoil, 10mm for hard-hitting stopping power and penetration, .45 ACP for classic 1911 character and manageable recoil in a heavy steel frame, and .357 SIG where flat trajectories and barrier performance are desired. Magazine capacity will vary by caliber and configuration; many .45 ACP STX examples use an 8-round magazine typical to full-size 1911 service patterns.

For those evaluating a versatile all-purpose handgun, consider what you expect to do most: target work, competition, home defense or duty use. The STX’s match-grade barrel and single-action trigger favor accurate follow-up shots, while the Magwell and ambidextrous controls speed transitions and reloads under stress.

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Performance and handling notes

On the range the STX rewards precise sight picture and deliberate trigger press. The 6.5-inch sight radius on the standard configuration helps tighten groups, and the weight of the stainless frame tames recoil, especially with .45 ACP loads. The adjustable combat night sights are set up for rapid target acquisition in low light. The match-grade internals and hand-fitting help ensure consistent accuracy and smooth cycling when paired with quality ammunition and magazines.

Maintenance and longevity

The all-stainless frame and Nitron slide treatment offer durable corrosion resistance and longevity when maintained properly. SIG’s attention to fit and finish reduces wear points; regular cleaning, inspection of springs and using magazines in good condition will keep the STX running for years without issue.

Value, options and final considerations

At the listed price of $1,152.99 the SIG SAUER 1911 STX FULL-SIZE sits in the premium range for factory 1911s, but it brings custom-shop touches — burled maple grips, a machined Magwell, night sights and match-grade internals — that justify the investment for serious shooters. The steel construction and factory tuning make it a strong option for collectors, competitive shooters and anyone who wants a modernized 1911 that remains true to the platform’s feel.

Who should pick the STX?

Choose the SIG SAUER 1911 STX FULL-SIZE if you value a hand-fitted, steel-frame 1911 with modern ergonomics and premium components. If you prefer a lighter polymer carry gun or need the highest possible magazine capacity, other platforms may be better suited. But for shooters who want that single-action 1911 experience upgraded for modern training and duty, the STX is a compelling, well-equipped option.

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People Also Ask

What makes this product stand out from competitors?

This product offers superior quality and innovative features that set it apart in the market. Its design focuses on both performance and reliability, making it a top choice for professionals and enthusiasts alike.

Is this product suitable for beginners?

Yes, this product is designed with user-friendly features that make it accessible to beginners while still offering advanced capabilities for experienced users.

What warranty or support is available?

The product comes with comprehensive warranty coverage and excellent customer support to ensure your satisfaction and peace of mind.

How does this compare to similar products in its price range?

This product offers exceptional value for its price point, providing features and quality that typically cost significantly more in comparable alternatives.

What maintenance is required?

Minimal maintenance is required thanks to the product’s durable construction and quality materials. Regular cleaning and occasional inspections will keep it performing optimally.