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If you plan to install Picatinny on your GK1, then my method is definitely worth referring to. 如果你打算在你的 GK1 上安装 Picatinny，那么我的方法绝对值得参考。 I've purchased two custom Picatinnys, both had their own issues, so I had to DIY. In fact, this is a very good design, stable and firm, but it is...