In the context of the Penal Code, what is classified as a deadly weapon by its construction alone?

A firearm is classified as a deadly weapon by its construction alone because it is specifically designed to cause death or serious bodily injury when used as intended. Firearms have the mechanical capability, purpose, and design to inflict lethal damage, making them a clear example of a weapon that qualifies as deadly solely based on these characteristics.

While explosive devices and knives also have the potential to be deadly weapons, they may not be considered deadly solely by their construction. For instance, the use of a knife depends significantly on the circumstances and the manner of its use, which can vary widely, and not all knives are designed as weapons. Similarly, although explosive devices can cause significant harm, their classification might depend on other factors related to their deployment or functionality. This highlights why firearms unequivocally fit the definition based on their inherent design and purpose.