Tactical Precision Manufacturing TPM Sig P365 XMacro 3 Round Extension Barrett Brown OSFA. Available in various colors to customize to your pistol. Specifications for Tactical Precision Manufacturing TPM Sig P365 XMacro 3 Round Extension: Manufacturer: Tactical Precision Manufacturing Gun Make: SIG Sauer Gun Model: SIG Sauer P365 X-Macro Package Contents: Tactical Precision Manufacturing TPM Sig P365 XMacro 3 Round Extension Set screw/short arm hex What firearm models does the manufacturer say Tactical Precision Manufacturing TPM Sig P365 XMacro 3 Round Extension is compatible with? The manufacturer says that Tactical Precision Manufacturing TPM Sig P365 XMacro 3 Round Extension is compatible with SIG Sauer P365 X-MacroTactical Precision Manufacturing SME-AL3-365-BB-3RD: TPM Sig P365 XMacro 3 Round Extension Barrett Brown OSFA