The BTL-B Y-wing starfighter was an assault starfighter/bomber that flew combat missions for the Galactic Republic during the Clone Wars.

Unlike the BTL-S3 Y-wing and its successor designs, the BTL-B model had a full covering of both the primary fuselage and engines. A bubble-turret provided clear view for the gunner.

The BTL-B was designed as a bomber, using such weapons as proton bombs. The bubble-turret utilized two light ion cannons for defense against enemy starfighters. It also was equipped with two medium laser cannons mounted on the front of the starfighter.

They possessed a hyperdrive system allowing them to jump into hyperspace without the reliance on a carrier or hyperspace ring. To aid them in their operations, they also made use of an astromech droid.