The Gemtech GM-45/Blackside Threaded Rear Mount Adapter provides secure mounting for GM-45/Blackside suppressors with 5/8x24 thread pitch compatibility for 300 Blackout firearms.Gemtech GM-45/Blackside Threaded Rear Mount Adapter5/8x24 thread pitch for precise fitmentDesigned for 300 Blackout caliber firearmsMatte finish for durability and reduced glareCompatible with GM-45/Blackside suppressor systemsThis precision-engineered adapter ensures reliable suppressor attachment for shooters using 300 Blackout firearms providing the secure connection needed for safe and effective suppressor operation.