Yeah I can see that. The kickback is a little too gentle, even though Garrus IS a beastly turian he would still be more affected by the blast.

I agree with zizka. That high-powered rifle looks like it should give a hell of a kick. 

Exaggeration is probably going to be good in this case. Just try it. 

While nice, I find the shooting animation really lacks impact/punch. Maybe playing with the frame speed would help with that, especially when he actually fires the gun.