Sig Sauer P320 Full Size 9mm 4.70″ 17+1 ROMEO-RS Pro

The Sig Sauer P320 Full Size is a modular, striker-fired 9mm pistol built for duty-style and range applications. This configuration features a Nitron finish, a 4.70" barrel, an optic-ready slide fitted with a ROMEO-RS Pro, and factory SIGLite night sights. The polymer frame and 17+1 capacity provide a balance of control and sustained shooting for training or service use.

Key Specifications

• The caliber is 9mm.
• The barrel length is 4.70 inches.
• The capacity is 17 + 1 rounds.
• The action is Striker Fired.
• The frame material is Polymer.
• The finish is Nitron (Black).
• Includes factory ROMEO-RS Pro optic and optic-ready slide.
• The sights are SIGLite night sights.
• The unloaded weight is 28.3 oz..
• The overall length is 8.2 inches.

This P320 Full Size package pairs proven modular ergonomics with an integrated optic solution and factory night sights to deliver a capable, service-minded pistol for range work and duty-style applications. Its combination of a durable Nitron finish, polymer frame, and included magazines makes it a practical option for those who prioritize reliability and straightforward functionality.