The Sig Sauer P320 Compact is a 9mm semi-automatic pistol with a 3.9-inch barrel and a 15+1 round capacity. It ships with the ROMEO-RS Pro optic and XRAY-3 night sights installed on a Polymer frame with a Nitron finish. 
 

Key Specifications 

• Brand: Sig Sauer 
• Model: P320 Compact 
• Caliber: 9mm 
• Action: Semi Auto 
• Capacity: 15+1 
• Barrel Length: 3.9" 
• Color/Finish: Black Base/Brown, Nitron 
   

Detailed Features 

• ROMEO-RS Pro optic included from factory 
• XRAY-3 day/night sights 
• Polymer grip frame 
• Nitron coated slide 
• 15-round magazine capacity

Owners of the P320 Compact with the ROMEO-RS Pro package tend to appreciate getting an optic and sights bundled at purchase rather than sourcing them separately. The 3.9-inch barrel sits in a useful middle ground between the full-size and subcompact, and most find it comfortable to carry while still easy to shoot well.

The Romeo-RS optic draws mixed feedback. Some shooters find it a capable carry optic right out of the box; others prefer to swap it for a different red dot, treating the included unit as a bonus. The XRAY-3 sights are generally well regarded as a backup regardless of what optic ends up on the gun.

The P320 platform itself is a common recommendation in this segment, and the Compact variant earns its place. Trigger feel and reset are consistent points of praise, though a small number of owners find the stock trigger pull weight heavier than they prefer and look to aftermarket options.