What function does the heat stop serve in a firearm?

The heat stop serves the important function of protecting the bolt's temper. In firearms, the bolt is a critical component that must maintain its structural integrity even when exposed to high temperatures generated during firing.

As the firearm is used, the heat generated can alter the properties of the metal, potentially leading to issues such as warping or weakening of the bolt. A heat stop acts as a thermal barrier, helping to dissipate heat and thus safeguarding the temper of the bolt material. This preservation of the bolt's characteristics is essential for reliable functioning and safety in firearms operation.

Understanding this role highlights the importance of thermal management in firearm design, ensuring that components can withstand the stresses of repeated firing without degrading in performance or safety.