Factory replacement for the P365-XMACRO grip module. It features a true 1913 accessory rail and three interchangeable backstraps (S, M, L) to ensure a proper fit for the user's hand. The medium backstrap comes preinstalled. Compatible with the 17-round P365-XMACRO magazine. Compatible with all P365 FCUs (Fire Control Units) with installed manual safety. Does not work with the CA P365 FCU due to the magazine disconnect safety. Note: A compatible slide assembly (P365XL or XMACRO length) and magazine must be used. Specifications for Sig Sauer P365-XMACRO Grip Module 9mm Compatible with 17RD P365-XMACRO Mag: Manufacturer: SIG SAUER Condition: New Color: Coyote Fabric/Material: Polymer Gun Make: SIG Sauer Gun Model: SIG Sauer P365 Gun Type: Pistol Weight: 2.5 oz Package Contents: Sig Sauer P365-XMACRO Grip Module 9mm Compatible with 17RD P365-XMACRO Mag SIG SAUER Infinite Guarantee What firearm models does the manufacturer say Sig Sauer P365-XMACRO Grip Module 9mm Compatible with 17RD P365-XMACRO Mag is compatible with? The manufacturer says that Sig Sauer P365-XMACRO Grip Module 9mm Compatible with 17RD P365-XMACRO Mag is compatible with SIG Sauer P365