The GPM MJ201R rear body post provides a spring-loaded mounting solution for AXIAL SMT10 platforms, improving impact flex and simplifying shell access. The internal spring reduces rigid loading on the shell during jumps, while the supplied ROADTECH body clips, sized for 1:16 and 1:18 vehicles, deliver a more secure retention method than small e-clips. Properly installed posts allow rapid body removal in roughly two seconds, letting technicians reach batteries and electronics with minimal delay.