The Type 21 (China) is a Chinese-made semi-automatic pistol developed in the early 21st century. It is a lightweight and compact handgun designed for personal defense and target shooting. The Type 21 features a polymer frame, a single-action trigger, and a magazine capacity of 15
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The Type 21 frigate, or Amazon-class frigate, was a British Royal Navy general-purpose escort that was designed in the late 1960s, built in the 1970s, and that served into the 1990s.