用于无明业火MK4B幼崽反吹玩具“成年化”的握把延长模组。直接在你已经打印好的MK4B上完成握把延长，省去重新打印下匣的麻烦。没有额外五金。

幼崽开源获取方式：https://www.bilibili.com/opus/943809541387059205

图片中完整的前管前管模组请在B站关注我，并在工房获得。

Grip extension mod for the Ruger MK4B baby blowback toy shooter (@WMYH_BLAZERS), transform a “baby shooter” into an “adult shooter”.

Direct attach the extension to your existing MK4B grip, saving you from the trouble reprinting the whole lower receiver, no extra hardware needed.