The Sig Sauer P938 Micro-Compact is a single-action 9mm Luger pistol with a 3-inch barrel, 7+1 capacity, and SIGLITE night sights. It weighs 16 oz, measures 5.90 inches overall, and has an aluminum alloy frame with black hardcoat anodized finish and a stainless steel slide with black Nitron finish. 
 

Key Specifications 

• Brand: Sig Sauer 
• Model: P938 Micro-Compact 
• Caliber: 9mm Luger 
• Action Type: Single Action Only (SAO) 
• Capacity: 7+1 rounds 
• Barrel Length: 3 inches 
• Overall Length (OAL): 5.90 inches 
• Weight: 16 ounces (1 lb) 
• Frame Material: Aluminum Alloy with Black Hardcoat Anodized Finish 
• Slide Material: Stainless Steel with Black Nitron Finish 
• Grip Material: Rubber with Finger Grooves 
• Sight Style: Siglite Night Sights 
• Safety Feature: Ambidextrous Safety 
   

Features 

At 16 oz and 5.90 inches overall, the P938 is one of the more compact 9mm options available in a 7+1 configuration. The SIGLITE night sights are a meaningful inclusion at this size class, providing usable low-light targeting without an aftermarket swap. The aluminum alloy frame and stainless slide combination keeps the weight down while maintaining durability. 
 
The single-action trigger provides a light, consistent pull. The ambidextrous manual safety works for right- and left-handed shooters, and the rubber finger-groove grips aid control during rapid shooting for a pistol this size.

Owners of the P938 consistently praise its compact size and low weight as the primary reasons they carry it. The SIGLITE night sights are called out as a genuine advantage over competing micro-compacts that ship with basic iron sights.

The single-action-only trigger is the most-discussed adaptation curve — shooters coming from double-action or striker-fired pistols need time to adjust to the manual safety and the feel of the SAO trigger. This is not usually framed as a defect but as something to be aware of before purchasing.

The 7+1 capacity draws occasional criticism from buyers who want more rounds, and a few owners report sporadic ammunition compatibility or magazine feeding issues, particularly with specific hollow-point loads. Reliability on ball and most defensive ammunition is generally rated as good. The P938 is consistently recommended as a carry gun for those who prioritize size and weight, with the caveat to evaluate comfort with SAO operation before committing.