Ammo problem with FA:S2

When I am using FA:S2 on any server or single player I can shoot, Aim and add attachments but I can’t view the ammo. People have been telling me to press R but that does not bring up anything. I have a fair bit of addons installed but this problem is really annoying me since I have to guess how much ammo I have in my gun.

hold R, don’t just press it in briefly.

I’ve also done that :confused: I don’t know if its any addons conflicting