Dead Air Fixed Barrel Spacer Adapts P-Series Booster Assembly for use with fixed-barrel firearms;Mimics direct thread mount operation for enhanced versatility;Designed for compatibility with Dead Air P-Series pistons and SD500 Booster Assembly;Perfect for fixed-barrel setups, ensuring seamless performance;Not compatible with Mojave Booster Assemblies or pistons;Works with Wolfman, Ghost 45, and Primal (with P-Series adapter) silencerstable.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