Manufactured with 4140 medium carbon steel and aluminium 7075, this shaft core is engineered to improve service life under high stress conditions. The section diameter is increased from 5.0mm to 7.0mm to raise stiffness and lower the risk of permanent deformation during heavy landings or hard impacts. Purpose-built to mate with both GPM and OEM shock assemblies, the component employs an improved oil sealing strategy that reduces leakage relative to simple O-ring systems.