I finally understood what it is and that’s why I created this topic.
1.Don’t look at the fact that it looks like a weapon, it’s just a disguise.
2.Use this as a club (I think this is exactly the way the developers intended).
In fact, the enemy will think that you will shoot and will not be able to oppose anything to an unexpected blow to the head.
Proof
Here you see a fool who thought that it was necessary to shoot with a nagant, and not to beat, so he was successfully killed.
(This guide is only suitable for an event, because I do not know how abnormal man have to be to purposefully play with it)