The mainspring tool for Remington bolts is a user-friendly spring compressor designed to facilitate the disassembly of the firing pin and mainspring from the bolt body. It features an anodized aluminum body, a steel lead screw and a large, ergonomic handle. When used in conjunction with the Sinclair Firing Pin Removal Tool, it is essential for safely changing firing pins or springs without causing damage to the bolt or its components. Additionally, it is compatible with Stolle Panda actions and other systems utilizing Remington-style bolts.