The Share Training (Ex) class feature of the Eldritch Guardian (EG) states that the familiar can use all combat feats the EG can use.
Does that include weapon proficiencies?
I ask, as it would seem very silly to have to take a feat that provides a benefit I already have.
Relevant links.
EG Archtype
http://www.d20pfsrd.com/classes/core-classes/fighter/archetypes/paizo---fig hter-archetypes/eldritch-guardian-fighter-archetype
Fighter
http://www.d20pfsrd.com/classes/core-classes/fighter
Martial Weapon Proficiency
http://www.d20pfsrd.com/feats/combat-feats/martial-weapon-proficiency---fin al
Heavy Armor Proficency
http://www.d20pfsrd.com/feats/combat-feats/armor-proficiency-heavy
PS: I am aware outsiders get martial weapon proficiency.