Evolution Gun Works Beretta Mainspring Housing Steel. Due to dimensional variations on magazines it may be necessary to remove a minimal amount of material from your magazine's basepad for the magazine to seat properly. Specifications for Evolution Gun Works Beretta Mainspring Housing: Manufacturer: Evolution Gun Works Color: Black Finish: Black Anodized Fabric/Material: Steel Gun Make: Beretta Gun Model: Beretta 92 Condition: New Package Contents: Evolution Gun Works Beretta Mainspring Housing What firearm models does the manufacturer say Evolution Gun Works Beretta Mainspring Housing is compatible with? The manufacturer suggests that Evolution Gun Works Beretta Mainspring Housing is compatible with Beretta 92Evolution Gun Works 20200-2: Beretta Mainspring Housing Steel