gunjack

例句：

1. 1.He's a professional gunjack who enjoys hunting with his friends.
   他是一个专业的枪械爱好者，喜欢和他的朋友们一起狩猎。
2. 2.The gunjack was the first to discover the new ammunition.
   这位枪械专家是发现新型弹药的第一位。
3. 3.Gunjacks often spend hours practicing their shooting skills.
   枪械爱好者经常花几个小时练习他们的射击技巧。