Aero Precision SOLUS Magnum Bolt Head Parts Kit 6.5 PRC 7mm SAUM 300 WSM 7mm WSM Black. Specifications for Aero Precision SOLUS Magnum Bolt Head Parts Kit: Manufacturer: Aero Precision Color: Black Action Type: Bolt Action Caliber: 6.5mm PRC 7mm Winchester Short Magnum 7mm Remington Short Action Ultra Magnum .300 Winchester Short Magnum Package Contents: Aero Precision SOLUS Magnum Bolt Head Parts Kit Magnum Extractor Extractor Detent (2x) Extractor Spring (2x) Ejector (2x) Ejector Spring (4x) Ejector Retaining Pin (2x) Bolt Head Pin (2x) O-ring Aero Precision APRH103345C: SOLUS Magnum Bolt Head Parts Kit 6.5 PRC 7mm SAUM 300 WSM 7mm WSM Black