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 safetyA safety is generally a mechanical system that prevents the gun from releasing the hammer or striker to activate the primer of a cartridge, thus expelling a projectile without a deliberate pull of the trigger.Specifications: Model: P365-XMACRO Brand: SIG SAUER Caliber: 9mm Luger Grip Texture: Standard Pistol Size: Compact Manual Safety: Yes Magazine Disconnect Compatible: No Color: Coyote Brown Grip Material: Standard Polymer Reversible Magazine Release: Yes Removable Grip Weight Compatible: No Interchangeable Grip Panel: Yes Interchangeable Backstrap: Yes