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Hi Steve, Fits Sig Sauer models calibrated for .40S&W and .45ACP and pistols that come factory standard with #6 Front / #8 Rear including P220, P229, P240, P245, P938, Pro233, Pro2340, Pro245, and P365. One reviewer on Amazon said they fit on his P320 40S&W. Stay safe & have a great day!

No according to the sig site the SG01 is the sight for the p320 the sig site does not mention Caliber https://www.budsgunshop.com/product_info.php/products_id/31904/bright+%26+tough+night+sight+set;+8+front+8+rear+-+for+sig+sauer+9mm+.357sig+excluding+p938 https://www.trijicon.com/products/product-family/trijicon-bright-tough-night-sights-for-sig-sauer-pistols?fits_model[]=P225%2C+P226%2C+P228%2C+P239%2C+and+P320+%28Excluding+P938%29.