A type of medium caliber guns apply gun short-recoil automatic mechanism cycle regularity, and use advanced technique to achieve high fire cycle, high accuracy and light weight.

某中口径舰炮采用炮身短后坐式自动机循环规律，运用先进的技术手段，实现了高射速、高精度和轻型化。

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Now he chats with his plain clothes rebel comrades next to a gun-mounted pick-up truck, hoisting a Belgian-made FN light automatic rifle that's half his height.

如今，他的手里拿着一把有他身高一半长的比利时制FN自动步枪，站在一辆皮卡战车旁与身着平民服装的反抗军同志们聊着天。

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