Bladesinger+Buckler

[Yogibear41]

Since a buckler shield is strapped to your arm and not held in the hand a Bladesinger (complete warrior) should be able to use a buckler with his off hand and a rapier/longsword in his main hand and retain use of his class features that require him to have nothing in his off hand, correct?

[Darg]

Bladesinger only requires you not to wield anything in your off-hand. A buckler can't be wielded except as an improvised weapon, and technically a tower shield can't be either. So yeah, a buckler should be fine, but talk to your DM.