The "K-Series Firearms" refer to a range of small arms developed by South Korea, including weapons such as the K1A submachine gun, K2 assault rifle, K3 light machine gun, and K14 sniper rifle. These firearms are standard-issue weapons for the South Korean military, offering reliability and precision in various combat situations. The K-Series firearms are designed to be lightweight and durable, and they have gained recognition both domestically and internationally for their performance.