Classic Army, (also known as CA) is an airsoft manufacturer based in Hong Kong. They are known for their high-quality fiberglass and metal airsoft guns, such as the popular Armalite series and the G36 series. They're also known for making their gearboxes out of metal including many of the internal parts, which offers higher lifetime and quality in the Gun. The average FPS rating is 310 FPS, and the average cost is $300. However, most-all of their products can be upgraded to a higher FPS and will evidently cost more. They also have an affordable sportline series, but is now of as high quality.
Classic Army are some of the most high-quality airsoft guns on the market, but read more on Real Sword which make undoubtedly the most reliable chinese AEGs.