Just tried out the demo and it is looking really good. Are you planning any more updates to this or is it pretty much finished?
Couple of things I noticed in the demo you might consider if you do plan another update.
The character should stop sprinting when trying to shoot or ADS. That is pretty normal in games for actions like that to override sprinting. Then when the player stops shooting or ADS, the character should continue sprinting if the shift key is still held down.
Some of the animations feel pretty slow. Like when the gun leans to the side while running as an example. It would feel more responsive if the animations were a bit quicker.
The character seems to be holding the gun pretty high when in hip fire. The difference between the guns position in hip fire and ADS is very small. From 3rd person, it looks like the character is ADS when they are actually in hip fire. Is it possible to hold the gun much lower when in hip fire, so it actually feels (and looks like from 3rd person) you are firing from the hip.