Dwarven Maulaxe, Still OK?

[Gully13]

The Dwarven Maulaxe (stats below) didn't make it into the new Equipment Guide. It originally appeared in the original Pathfinder Chronicles Campaign Setting hardback. It was not brought into The Inner Sea World Guide, but does appear in the Adventurer's Armory (and it's errata). Since the additional resource section says everything in the book is legal (see below) with the Maulaxe not being an exception, I assume it is still OK for my Dwarf Urban Ranger?

Thoughts?

Dwarven Maulaxe

25gp, 1d4, 1d6, x3, 10ft range, 5lbs., B or S

Info:

This versatile weapon is a unique design passed down through the dwarvish lords of the Five Kings. It initially appears like a heavy-headed axe, but a skilled wielder can strike equally well with its chopping edge as with the forged sledge that backs the blade.

Benefit: This weapon can be used to deliver bludgeoning or slashing damage as the wielder desires.

Special: A dwarven maulaxe is a martial weapon for dwarves and an exotic weapon for members of other races. It is not a double weapon, and any enchantments applied to the weapon operate normally regardless of which part of the weapon’s head is used to deliver the blow, except for enhancements that apply only to blunt or sharp weapons. Such enhancements apply only to attacks dealing the appropriate type of damage.

PFS Adventurer's Armory:

Only the 2nd printing of this book or the 1st printing augmented by the current errata (released 7/21/11) are legal for play in Pathfinder Society Organized Play.
Everything in this book is legal for play with the following exceptions: a pseudodragon is not legal for purchase unless you’re a wizard with the Improved Familiar feat, elephants are never legal for play, and armored kilts are not legal.

[Thorkull]

You mean Ultimate Equipment? Just because it didn't make the cut for that book doesn't mean it's not valid for use. Until it's removed from the allowed list in Additional Resources, it's still legal.