I think bipod mounting is finicky and needs to be made smoother or more obvious.
Sometimes you need to crouch to mount, sometimes you need to stand, sometimes you can't mount at all. I don't know how many times I've died trying to mount my LMG while behind sandbags or a broken wall. I stand, I crouch, I turned around, I shift my position, spamming the mount button the whole time, and just as I found the sweet spot and mount my gun, I die.
I think this game needs some kind of indicator that you can, in fact, mount your gun. Maybe some kind of animation while you're in the sweet spot or maybe a little icon that denotes your in the sweet spot kind of like when you open a door. Maybe the icon would be best because it could be a better medium at indicating whether you need to stand or crouch to mount.
Either way, I think it'd be useful to have.