Normally, Gloves of Dueling increase the bonus of a fighter's weapon training feature. However, the Free Hand Fighter's Singleton feature replaces weapon training. They appear to do almost the exact same thing, but I'm still worried if it would grant the extra +2. Any thoughts?
Singleton (Ex): At 5th level, a free hand fighter gains a +1 bonus on attack and damage rolls when wielding a melee weapon in one hand and leaving his other hand free. This bonus increases by +1 per six levels after 5th. This ability replaces weapon training 1 and 4.
Gloves of Dueling
Aura faint transmutation; CL 5th
Slot hands; Price 15,000 gp; Weight —
Description
These supple leather gloves grant the wearer gains a +4 bonus to his CMD against disarm attacks, attempts to sunder his wielded weapons, and effects that cause him to lose his grip on his weapons (such as grease). The wearer doesn't drop held weapons when panicked or stunned. If the wearer has the weapon training class feature and is using an appropriate weapon, his weapon training bonus increases by +2.
Construction
Requirements Craft Wondrous Item, greater magic weapon; Cost 7,500 gp
A Free Hand Fighter does not get the weapon training class feature, so no. You can always ask your Gm to houserule it, of course.