The first one is the best. Very good work! Especially like the way the soldier tilts the rifle to take the safety off.
A few notes, though. Note that you slap the cocking handle down, you don't flick or pull it down (so the first animation got it right). And you pull it back using the palm of your hand, not your fingers. Could even use a little less time from pulling the magazine out (you don't put it anywhere, you just drop it) to pulling back on the cocking handle. And the rifle should move less around, because you clamp the buttstock between your elbow and side for stability and to keep it pointing in the right direction. Details.
Could probably ask the military guys in here to give you demos, couldn't you? It's not as if it's a lot of work.
