Refer to Call of Duty. It’s really necessary. It’s easy to lose enemies by switching on and off。
https://baijiahao.baidu.com/s?id=1638028415353853344&wfr=spider&for=pc
I’ve never heard of a mirror reload, but if I read the article right it’s showing how many bullets are in your magazine? This would be helpful but there’s already a ammo counter on the HUD and I believe its already in the game too. How this helps lose enemies I have no idea, could you explain a bit more than just linking an article that talks about a few different things and that’s in Chinese?
The meaning of Google Translate I used may be incorrect.
Change the bullet when the mirror is open.
Refer to the video below at 0 minutes and 53 seconds.
00：53
Do you understand what i mean
So, reload when u still aiming? 
Thanks for the clarification. I would understand it for higher rank soldiers to reload while aiming since they have the experience but a rank 1 soldier who you just got wouldn’t be as fluent and they could reflect this ingame too. I do agree but as stated only higher rank soldiers would have the skill to not have to look down to their ammo belt, open one of the pouches and get a mag out, etc.
I’m not thinking about the rank of soldiers.
When I used kar98k, I found the enemy, opened the lens, the shot missed, and when the bolt was pulled, the lens would be closed automatically, and the enemy might be out of my sight. If I can keep aiming while pulling the bolt, then I can keep watching the enemy’s movements.
This is my requirement. My advice.
Hope you can understand what I mean.
When using a sniper rifle, you can better observe the enemy’s movement. When pulling the bolt, when using a high-power lens