Dead Air Rimfire Accessory Thread Adapter GSG 1911 to 1/2-28 Designed for use with the Dead Air Mask silencer;Provides compatibility with various host firearms;Expands functionality and adaptability;Multiple thread adapter options available;Ensures secure and reliable attachmenttable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Item Category Code: 7600 Product Group Code: 7600P Inactive: No Prop65 Applies: Yes Prop65 Cancer Harm: Yes Prop65 Chemical: Lead