frujai gravity anchor?

[Ravien999]

In the frujai gravity anchor it says "if the attack hits, the soldier can attempt either a reposition or a trip combat maneuver against the target as a free action, using it's gravity anchor's attack bonus of +4 to perform the maneuver"

But the attack bonus is +22? Does this mean using an additional bonus of +4? Or what?

[Garretmander]

It's probably meant to be an additional +4 bonus.