A locked model can choose only to make a combat action as its
action and cannot make a special attack. At the beginning of its
combat action, a model suffering a headlock/weapon lock must
attempt to break the lock. When a break attempt is made, both
models involved in the lock roll a d6 and add their STR. If the
locked model’s total exceeds that of the model holding the lock, the
lock is broken. The locked model can make its initial melee attacks
with any melee weapon not located in a locked system as normal.
After resolving these attacks and attempts to break free, a warjack
can spend focus points to make more attempts to break a lock or
to make additional attacks with usable weapons, at 1 focus point
per break attempt or additional attack. Once a lock is broken,
the model can use the weapon that was locked to make additional
attacks during its activation. At any time during its activation,
a model can voluntarily release a lock it is maintaining.