Tactical Precision Manufacturing TPM Sig P320/X5 Legion 5 Round Extension Sig Grey OSFA. Available in various colors to customize to your pistol. Specifications for Tactical Precision Manufacturing TPM Sig P320/X5 Legion 3 Round Extension: Manufacturer: Tactical Precision Manufacturing Gun Make: SIG Sauer Gun Model: SIG Sauer P320 X5 Legion Package Contents: Tactical Precision Manufacturing TPM Sig P320/X5 Legion 3 Round Extension Set screw/short arm hex What firearm models does the manufacturer say Tactical Precision Manufacturing TPM Sig P320/X5 Legion 3 Round Extension is compatible with? The manufacturer says that Tactical Precision Manufacturing TPM Sig P320/X5 Legion 3 Round Extension is compatible with SIG Sauer P320 X5 LegionTactical Precision Manufacturing SME-AL5-320-SG-5RD: TPM Sig P320/X5 Legion 5 Round Extension Sig Grey OSFA