No, it happens on all guns, not just the mosin carbines. I know about the machineguns and how they're supposed to be like that, but I'm not talking about that.
It's hard to explain, but basically I press the aim button, and unless I'm not moving my mouse, the transition from hip to aiming is not smooth at all, it's like my mouse just lags out for a moment. This doesn't happen in vanilla BF2 and it does happen in PR as well, but not as severely. I'm just wondering if it's a game flaw I just have to live with or something's wrong on my end?