There are a few things that are not correct with the G36K.
The fire modes are false, the only fire modes are secured, semi and full auto. It has no burst mode. I have shot with many different G36 and G36K from A0 to A4 version in the german army and none of them had a burst mode. Even on the Heckler and Koch website are the only fire modes in technical datas secured, semi and full auto. No burst mode. Link here: https://www.heckler-koch.com/de/produkte/militaer/sturmgewehre/g36/g36k/technische-daten.html
The fast reload with G36K is totally t. Ingame fast reload: taking a new magazine and then changing is a very slow reload. You have first to take your hand off the weopon, grab a new mag then change it and then there is this weird animation of taking the slide catch lever with the left hand. If there is a longer slide catch lever in the G36 (it is an optional feature) you will always take your right hand to push it, never the left one thats way too slow. The fast reloud is very unrealistic and way too slow.
Fast reload with G36 in real life goes by throwing the magazine away, taking a new one ramming it into the weapon and moving the back locked slide a little bit back so it will close itself or if it has a slide catch lever you push it with the right hand. That should just take a few seconds, it is trained very often in the german army.
The G3 reload animation is false too. When the magazine is shot empty, the slide has to stay back, so when you reloud you only have to push it down a little and it will close automatically. That would be a much faster and realistic reload. I have shot with a few G3 in the army and the slide always stayed back when shot empty, so it does with every other rifle i know too.
I hope this will be fixed. It is just cosmetics, but as german army officer it is really annoying for me to have an unrealistic G36K, i have been so happy to see it ingame.