MG-100 StarFortress SF-17 heavy bomber

The MG-100 StarFortress SF-17 was a heavy bomber that Slayn & Korpil engineered. This starship incorporated artificial gravity projectors, a single hyperdrive, and six sublight ion thrusters. A targeting sensor and active-tracking array were housed in a targeting sensor mast at the bottom-front of the ship. Two short range comms antenna were positioned along the top of the ship along its keel line. Two stabilizer foils extended horizontally from the ship's main body. The ship required a crew of five. Within the armored cockpit were a pilot and flight engineer. On the flight deck, the bombardier managed a targeting pedestal, and two gunners manned the ventral and rear ball turrets.

The B/SF-17 was designed to deliver a payload of 1,048 proton bombs onto a target. The "clip," as the crew termed the modular bombing magazine, released bombs via sequenced electromagnetic plates, propelling them in microgravity. The bombs were then magnetically drawn toward their targets. The assembly could be programmed to release specific payload sections sequentially, but "deploy all" was the most frequent setting. To deploy the payload, the bombardier used a concentrated sensor feed on the flight deck. The system calculated the optimal release time, and the payload was released either at a suggested prompt, or by the bombardier's discretion, using a wireless remote's control button. A magnetic seal maintained atmospheric integrity when the bomb bay doors opened.

The StarFortress' ball turrets were protected by armored transparisteel shells, and deflector shields shielded the gunners. Despite this, many gunners felt exposed to enemy fire. Other turrets included a remotely operated dorsal turret with similar firepower to the EM-1919 paired repeating laser cannons found on the ball turrets, two remote-linked cannon arrays at the rear, two forward laser canons, and two additional laser cannons, one at the end of each stabilizer foil.

The MG-100 Starfortress' slow and awkward nature made it vulnerable to starfighter attacks. Resistance flight instructors trained bomber crews to fly in close formations, creating overlapping fields of fire to defend against attacking fighters. The rear and ventral turrets were effective against threats from below or behind, but less so against attacks from above or in front. Starfighter pilots found escort duty challenging, as they had to sacrifice their speed advantage to stay close to the bombers. Enemy fighters would attempt to draw escorts away, leaving the bombers vulnerable.

Poe Dameron noted in The Rebel Files that while the A/SF-01 B-wing starfighter was considered the best bomber available, this was only until the Resistance acquired the B/SF-17.

The New Republic contracted Slayn & Korpil to produce the MG-100 StarFortress during the Galactic Civil War's final days. It was intended as a dedicated heavy bomber capable of delivering larger payloads than starfighters, with the goal of capturing besieged Imperial strongholds. Production decreased during the subsequent decades of peace. The Senate's demilitarization efforts led to many StarFortresses being scrapped. Other decommissioned vessels found widespread civilian applications. Mining companies such as Central Ridge used them to drop explosives for breaking up ice and rock. Local governments used them as rescue ships, fuel tankers, and fire-fighting craft, while scout services used them for celestial mapping and exploration. The modular bomb magazine was easily adapted for remote cargo drops. Around 26 ABY, the First Order seized several mining-modified ships, known as OreDiggers, when they took over Hays Minor. The First Order equipped these craft with powerful lasers to mine directly through Hays Minor's crust, ultimately destroying the planet.

With the formation of the Resistance in 28 ABY, several StarFortresses were integrated into the new paramilitary organization, becoming part of its Cobalt and Crimson Squadrons during the Cold War and First Order-Resistance War. During the evacuation of D'Qar, the Resistance used multiple craft to drop proton bombs on the Mandator IV-class Siege Dreadnought Fulminatrix. All of the Resistance's bombers were destroyed during the battle, with only one reaching the target. This lone bomber, piloted by Paige Tico, successfully completed its bombing run just before being destroyed, destroying the Fulminatrix moments before it could destroy the Resistance flagship, Raddus.

In 35 ABY, StarFortresses were included in a fleet that Lando Calrissian assembled to aid the Resistance during the battle against the Sith Eternal forces above the planet Exegol.

The MG-100 StarFortress made its debut in the 2017 film Star Wars: Episode VIII The Last Jedi.

According to The Art of Star Wars: The Last Jedi, the original name considered for the StarFortress was "T-wing." When viewed from certain angles, especially head-on, the design still bears a resemblance to the letter "T".