The Sig Sauer P320 Compact is a 9mm Luger striker-fired pistol with a 3.90-inch barrel, a 10+1 capacity, and an optics-ready Nitron slide. This configuration includes a manual safety and is built to Massachusetts compliance specifications. The slide is optic-ready without additional milling. 
 

Key Specifications 

• Brand: Sig Sauer 
• Model: P320 Compact 
• Caliber: 9mm Luger 
• Action: Semi Auto 
• Capacity: 10+1 
• Barrel Length: 3.90 in 
• Color/Finish: Black / Nitron 
   

Detailed Features 

• Striker-fired action with manual safety 
• Optics-ready slide with Nitron finish 
• 3.90-inch barrel in a compact frame 
• MA-compliant configuration 
• 10+1 capacity

The P320 Compact MA version is purchased primarily by shooters in compliance-restricted states who still want the P320 platform. Most owners treat the manual safety as a minor inconvenience rather than a feature they sought, and some disable or remove it post-purchase where legal.

The optics-ready Nitron slide is appreciated across the board. The 3.90-inch barrel gives the compact a manageable size without sacrificing too much ballistic performance over a full-size. Trigger feel on the P320 Compact generally draws positive comments, though some shooters find the pre-travel longer than expected.

The 10-round capacity is the most consistent point of frustration and is understood as a compliance artifact. Outside of that, the P320 Compact MA configuration is seen as a solid-performing pistol that trades some capacity for legal compliance in restricted markets.