HMB Spare Bolt Assembly

HMB Bolt Assembly & Cartridge Swapping Maximize the versatility of your rifle with our Complete HMB Bolt Assemblies. Engineered for the HMB series of actions, these assemblies allow you to swap cartridges within the same receiver for ultimate modularity. Ready-to-Use: Each bolt assembly comes complete and ready to drop into your HMB action. Modular Capability: Easily switch between compatible cartridges without needing a new action. ⚠️ Critical Safety Note: While these bolt assemblies are designed to be drop-in, every bolt must be checked for proper headspacing by a qualified gunsmith before use to ensure safety and function