What is the effect of environmental factors on the performance of small arms?

The correct choice emphasizes that environmental factors can significantly alter both the accuracy and reliability of small arms. Various conditions such as temperature, humidity, altitude, and even atmospheric pressure can affect the performance of firearms.

For instance, extreme temperatures can influence the viscosity of gun lubricants, potentially leading to malfunctions or affecting the cycling of semi-automatic and automatic actions. High humidity can result in increased corrosion of metal parts, especially if proper maintenance is neglected. Wind and other environmental conditions during live firing can also impact bullet trajectory and therefore accuracy, as shooters must compensate for these elements when aiming.

Overall, environmental factors play a crucial role in how effectively and reliably small arms perform in different scenarios, underlining the importance of understanding these influences for optimal operation in various settings. This knowledge is crucial for military personnel when considering the conditions they may encounter during operations.