Hi, do you happen to have an explanation for those stats? 

WEAPON STATS

Using M98B by having KMP 0.34 that means I kill one player every 3 minutes, and snipers have higher HSKR that's normal, I usually shoot targets that don't move so that's why those data seem high. I owned this game since it was on the shelf. And I play all battlefield series, 2,3,4, hardline. It makes no sense that I use any plugins to cheat.

How about deagle, mtar and A-91?

I believe I would have the same explanation as before, I am an old player who plays this game maybe since 2010, I have enough experience and judgment. It is not fair to me only by those data. And I actually uninstalled the game around 3 years before but since the self-quarantine order in California, I stayed at home and download it back again then suddenly found I was banned.

Have you by any chance done some kill trading/stat-padding with those guns?

Even if you play since release (which was in 2013, not 2010), you only got 300h so that doesn't mean much at all. Even extremely good players don't achieve that kind of HSPK ratio with those guns, that's just not a thing unless you're going extreme tryhard for heads.

I actually do not understand what is kill trading action is, I checked the translation I don't think I had any actions against the game/server rule in the past, nor taken any unfair advantages of others.

Kill trading means going into an empty server with your friend(s) and getting free kills by killing each other to unlock stuffs.

No

Firstly, BF4 was released in 2013.

Secondly, if you haven't kill-traded, your stats are indeed abnormal. The game mechanic simply doesn't support  getting high HSKR on certain weapons unless you are deliberately trying to get this kind of stats.

No response from OP to explain his statistics.

Appeal Denied.