this is the code for the SCAR weapon in the FreeSDK.
Code:
<action name="reload_chamber_empty">
<animation target="firstperson" name="reload_01" />
<animation target="owner" name="reload_chamber_empty" />
</action>
<action name="reload_chamber_full">
<animation target="firstperson" name="reload_01" />
<animation target="owner" name="reload_chamber_full" />
</action>
Just change the name of the animation to the desired one.