Switching weapon in state of walking/jogging/running makes your character stops almost every time depending of what you take when you walk at a certain speed.
I can understand that switching weapon while running made my character slow down but that's not always the case.
Plus it also depend on the state you are in : fists/weapon lowered or raised.
In the worst case (running while fist raised), your character will jump, stop, and then switch weapon!!!
The only proper state is jogging with fists/weapon lowered, all other are messed up.
Since there are 40 different states, I've made a spreadsheet you can see here :
https://imagizer.imageshack.us/v2/1293x202q90/746/aec2da.png
We really need a smooth transition when switching or taking out a weapon and even better : not being stuck in walking speed while switching because for now, if I switch from axes to riffle while jogging, I'm stuck in jog mode during the animation of switching even if I release W (Z in my case, azerty keyboard ^^).