Tactical Precision Manufacturing TPM Sig P320 Compact 3 Round Extension Midnight Bronze OSFA. Available in various colors to customize to your pistol. Specifications for Tactical Precision Manufacturing TPM Sig P320 Compact3 Round Extension: Manufacturer: Tactical Precision Manufacturing Gun Make: SIG Sauer Gun Model: SIG Sauer P320 Compact Package Contents: Tactical Precision Manufacturing TPM Sig P320 Compact3 Round Extension Set screw/short arm hex What firearm models does the manufacturer say Tactical Precision Manufacturing TPM Sig P320 Compact3 Round Extension is compatible with? The manufacturer suggests that Tactical Precision Manufacturing TPM Sig P320 Compact3 Round Extension is compatible with SIG Sauer P320 CompactTactical Precision Manufacturing SME-AL3-320C-MB-3RD: TPM Sig P320 Compact 3 Round Extension Midnight Bronze OSFA