wow man, thats great!,
but as JOSH said, the wrist/arm movement is a bit unnatural.
now i know nothing about modeling and animation, but maybe if you got hold of a toy gun or something and
focus on how your arm moves as you 'pretend' to reload, hell, you probably are American yeah? just borrow your little sisters machine gun

,
or check out some other fps reload movements so you can gauge the movement?
looks great tho!