Sylvan Arms Compatible Conversion Block Sig P320 Black 0. Designed for seamless integration it installs into Mil-Spec AR15 receivers with the ease ensuring enhanced versatility without compromising functionality. Specifications for Sylvan Arms Sig P320 Compatible Conversion Block: Manufacturer: Sylvan Arms Color: Black Chassis Material: Steel 6061-T6 Aluminum Gun Make: SIG Sauer Gun Model: SIG Sauer P320 Features of Sylvan Arms Sig P320 Compatible Conversion Block Simple installation and quick swap-out capability Compatible with popular Sig P320 9mm magazines Specifically engineered for Mil-Spec lower receivers Note: Does not include last round bolt hold-open functionality Note: 9mm upper receiver required for proper functionality Package Contents: Sylvan Arms Sig P320 Compatible Conversion Block What firearm models does the manufacturer say Sylvan Arms Sig P320 Compatible Conversion Block is compatible with? The manufacturer says that Sylvan Arms Sig P320 Compatible Conversion Block is compatible with SIG Sauer P320Sylvan Arms SCB100: Compatible Conversion Block Sig P320 Black