This comes from the factory with SIGHTS:SIGLITE Night Sights.

Hi Miguel, Yes the P320 has Siglite Night Sights - Specs - SIG P320 NIT PST 9MM 17R NS 3B Brand: Sig Sauer Model: P320 Nitron Carry Type: Pistol: Semi-Auto Caliber: 9MM Finish: Matte Black Nitron Action: Double Action Only Stock: Stainless Frame With Polymer Modular Grip Sight: FT: SIGLITE RR: Fixed SIGLITE Barrel Length: 3.9 Overall Length: 7.2 Weight: 26.5 oz Capacity: 17+1 # of Mags: 2 Receiver: Aluminum Packaging: Plastic Case Features: Modular Striker-Fired; Integral M1913 Accessory Rail

Yes, the sights that come with this are considered night sights.

yes it has the Siglite night sights UPC:
798681514236
Description:
SIG P320 NIT PST 9MM 17R NS 3B
Brand:
Sig Sauer
Model:
P320 Nitron Carry
Type:
Pistol: Semi-Auto
Caliber:
9MM
Finish:
Matte Black Nitron
Action:
Double Action Only
Stock:
Stainless Frame With Polymer Modular Grip
Sight:
***************FT: SIGLITE RR: Fixed SIGLITE
Barrel Length:
3.9
Overall Length:
7.2
Weight:
26.5 oz
Capacity:
17+1
# of Mags:
2
Receiver:
Aluminum
Packaging:
Plastic Case
Features:
Modular Striker-Fired;
Integral M1913 Accessory Rail