Can I use Opportunistic between the two melee attacks granted by Pummel to move the attacking figure?

Does the "interrupt" allow you to break those two actions?

Short answer: No

Long answer: Even though Pummel grants you 2 attacks, it still counts as a "single special attack action that requires 2 actions". Note the use of words "single special attack action", which means

1. It hasn't been fully resolved until you perform 2 attacks

2. It still counts as 1 attack action, it's just that it requires both of your actions to do this single "special attack action". If some external stuff grants you extra actions (ex. Meditation, you have 3 actions) AND you have assault/you're Jedi Luke, you can still perform another attack action

Therefore, you cannot try to squeeze in extra fancy stuff until you've fully resolved Pummel

There are fancier technical terms such as "Perform X", the precise definition of "interrupt", but roughly that's the gist of it

You can use Opportunistic , and the movement points go into the movement point pool. However, you cannot spend movement points during Pummel . You can spend movement points during your activation before or after actions, but not during an action. The special action Pummel is resolved only after you have performed both attacks (or first, if there is no longer a valid target for the second attack).

RRG, Action said:

· Movement points can be spent before or after performing an action. If movement points are gained as part of a special action, they must be spent immediately during that action.

( Move X spaces could and would need to performed immediately.)

Cool. Thanks!