The Sig Sauer 1911 Full Size STX is a single-action .45 ACP pistol built on a stainless steel frame with a black Nitron slide. It ships with SIGLITE Combat Night sights and burled maple wood grips, combining a traditional 1911 layout with modern sight treatment. 
 

Key Specifications 

• Brand: Sig Sauer 
• Model: 1911 Full Size STX 
• Caliber: .45 ACP 
• Action: Single Action Only (SAO) 
• Capacity: 8+1 rounds 
• Barrel Length: 5 inches 
• Weight: 41.60 oz (2.6 lbs) 
• Frame Material: Stainless Steel 
• Slide Finish: Black Nitron 
• Grips: Burled Maple Wood 
   

Detailed Features 

• Stainless Steel Frame & Black Nitron Slide: Corrosion-resistant frame with a contrasting black slide finish. 
• SIGLITE Combat Night Sights: Tritium-illuminated front and rear for usable sight picture in low-light conditions. 
• Burled Maple Wood Grips: Adds grip texture and a distinct look; wood grips run warmer in the hand than polymer alternatives. 
• Thumb and Grip Safety: Standard 1911 safety configuration; both are present and functional.

The Sig Sauer 1911 STX in .45 ACP draws favorable comments overall, particularly from shooters who appreciate traditional 1911 styling with some practical upgrades.

Build quality is consistently praised. The stainless frame and black Nitron slide are well-fitted, and the burled maple grips get frequent attention as a visual and tactile highlight.

Accuracy and smooth trigger pull are the most cited performance strengths. The single-action trigger on a properly fitted 1911 is a known quantity, and the STX delivers on that.

The SIGLITE night sights are appreciated for low-light utility, particularly by users who consider home defense a primary use case.

Weight at 41.60 oz. comes up in carry discussions. A full-size all-steel 1911 is heavier than polymer-framed alternatives, which matters for all-day carry but less so for range use or home storage.

Magazine capacity at 8+1 rounds is the most common point of comparison against modern striker-fired pistols. Most buyers who choose this platform know what they're getting; those who want higher round counts are usually looking at different guns.

Price is generally seen as appropriate for Sig Sauer's quality tier in this market segment.