Which of the following products is designed to protect a bolt's temper from excessive heat?

The product designed to protect a bolt's temper from excessive heat is often referred to as a heat stop. This type of product is specifically formulated to absorb and redirect heat away from sensitive areas of a firearm, such as the bolt, which is critical for maintaining its hardness and overall integrity.

Heat stops work by forming a barrier that reduces the amount of heat transferred to the bolt during processes like welding or high-temperature operations. By preventing the bolt from exceeding its tempering temperature, these products help ensure that the material properties remain intact, which is crucial for the reliable functioning of the firearm.

Understanding the role of heat management in firearm maintenance emphasizes the importance of selecting appropriate materials and products in the assembly and repair processes to maintain the safety and effectiveness of the firearm.