Razz, I think a better way to think of this is weapon inertia. Basically, the heavier the weapon the harder it is to get moving and the harder to get stopped. Now the Robar won't be like moving a mack truck, but it should be noticably harder than a light MP5. Ideally, this would reflect a difference between the M203 and non-M203'd M16.
BTW, Yurch
Reading through the beta logs, it looks like a fair number of really signature RA features are integrated. From what I could read, there is some positional relationship to recoil, as well as stamina links to jogged aiming. Since you've played the betas, what is your take on the need for RAV3? Is the scope sensitivity in there?