Which lubricants should be used for the M240B when temperatures exceed -10°F?

The M240B machine gun requires specific lubricants to ensure optimal performance, especially in extreme temperature conditions. When temperatures exceed -10°F, the recommended lubricants are CLP (Cleaner, Lubricant, Preservative), LSA (Lubricating Semiautomatic Action), and LSA-T (Lubricating Semiautomatic Action - Temperature). These products are specifically formulated to endure cold weather conditions while providing adequate lubrication and protection against wear and corrosion.

CLP serves multiple functions: it cleans, lubricates, and preserves firearm components. LSA is designed to provide excellent lubrication for automatic weapons, and LSA-T is tailored for use in extreme temperatures, ensuring that the lubricant remains effective even when it's very cold. This combination helps maintain functionality and reliability under challenging conditions, which is crucial for military operations.

Other options, while they may have lubrication properties, do not meet the specific requirements for the M240B under these conditions. Therefore, the choice of CLP, LSA, and LSA-T serves the best interest of maintaining the performance and longevity of the firearm in low temperatures.