The Sig Sauer P320 is a striker-fired semi-automatic pistol chambered in 9mm with a 3.9-inch barrel. This configuration ships with a 15-round magazine, Siglite night sights, an optic-ready slide, and a manual safety. The Nitron black finish covers the slide over a polymer grip module. 
 

Key Specifications 

• Brand: Sig Sauer 
• Model: P320 
• Caliber: 9mm 
• Action: Semi Auto 
• Barrel Length: 3.9 in 
• Capacity: 15 rounds 
• Color/Finish: Black (Nitron) 
   

Detailed Features 

• 3.9-inch barrel in a compact frame 
• 15-round magazine capacity 
• Optic-ready slide cut 
• Manual safety installed 
• Siglite night sights 
• Polymer grip module

P320 owners in the compact configuration tend to appreciate the modularity of the platform. The ability to swap grip modules and caliber conversions is a frequent talking point, and owners who carry the Compact note that the 3.9-inch barrel gives a usable sight radius without making the pistol hard to conceal.

The optic-ready cut on this variant is well received. Owners who run a red dot say the slide cut is clean and compatible with a wide range of optics. The manual safety divides opinion: some carriers specifically sought it out for administrative handling, while others find it an unnecessary step in a striker-fired platform.

Reliability feedback on the P320 Compact is generally positive. The Siglite sights are considered a practical standard inclusion. A recurring note is that the trigger, while functional, is not a standout feature, and some owners swap to an aftermarketolecule early on.