Viewed head-on, the K-wing resembles a capital K lying on its face--a single center fuselage, two medium straight wings above, two short angled wings below (ending in landing skids). Just outboard of the fuselage on the straight wings are two of the three primary thrust engines; the third is further aft in the fuselage, on the centerline, and has vectored-thrust nozzles. The third engine's vectored thrust allows for non-ballistic translations during attack runs, increasing survivability. The four wings have a total of 18 hard points (10 up, 8 down) to which a variety of ordnance packages can be attached. The wings are swept and staggered, with the upper wings set further back than the lower to provide drop clearance. The total weapons payload of a K-wing exceeds that of any other starfighter by a substantial margin, and is the equal of the larger TIE bomber. In some load-out configurations, not all 18 hard points can be used. The K-wing has a two-man crew (pilot and weapons specialist officer). The WSO controls the launching of the ordinance and other hardpoint attachments, while the pilot controls the lasers while the WSO is preparing for ordinance deployment (if needed).
The K-wing has no integrated air defense capability of its own unless equipped with anti-starship missiles as part of its load-out. However, even when so equipped, the K-wing makes a poor dogfighter, and standard combat protocols call for K-wing missions to receive fighter coverage at no less than a 2-to-1 ratio; 1-to-1 where possible.
The performance specs of the K-wing are closely held secrets. In general, the K-wing is not noted for either its rate of acceleration or its top speed in a planetary atmosphere. However, it is known that the K-wing can go supersonic at pressures up to five atmospheres, and can outrun an X-wing in a sufficiently long straight-line race in vacuum.
The K-wing is an exception among New Republic starfighters in that it is not equipped with hyperdrive, and must be ferried to the target in a fleet carrier. Eliminating the hyperdrive was a compromise dictated by the demands of the assault role--an extremely strong and compact airframe, dual shield generators, the third engine, and various other redundant systems. Because of this, the K-wing usually has a dedicated starfighter transport.
As with all larger, multi-crew New Republic starfighters, the K-wing employs "smart" systems rather than an astromech droid. Initial trials of the K-wing were carried out aboard the training carrier Monitor. The first operational wing was assigned to Task Force Quickfire of the Third Fleet.
(Capsule modified from from the Black Fleet Crisis FAQ (http://www.sff.net/people/K-Mac/black.htm#K-wing) - this is non-official information from the author)

K-Wing Starfighter - D6 Stats
Craft: RFS' B-72C K-wing Heavy Bomber
Type: Precision aerospace heavy bomber
Scale: Starfighter
Length: 13.6 meters
Skill: Starfighter piloting: K-wing
Crew: 1; gunner: 1
Crew Skill: (Capital ship gunnery 5D) sensors 3D, Starfighter piloting 4D+2 (Starship gunnery 5D)
Cargo Capacity: 25 kg
Consumables: 1 day
Cost: 225,000 (new)
Manuverability: 1D+1
Space: 8
Atmosphere 435; 1,250 kmh
Hull: 5D
Shields: 2D+2
Sensors:
Passive 10/1D
Scan 25/1D+2
Search 50/2D+2
Focus 2/3D
Weapons:Scan 25/1D+2
Search 50/2D+2
Focus 2/3D
18 Ordnance Hardpoints
Fire Arc: Varies
Skill: Starship gunnery
Crew: WSO
Fire Control: Varies
Space Range: Varies
Atmosphere Range: Varies
Damage: Varies
Skill: Starship gunnery
Crew: WSO
Fire Control: Varies
Space Range: Varies
Atmosphere Range: Varies
Damage: Varies
Note: The K-wing can be fitted with up to 18 concussion missiles (7D - 1 hardpoint), 18 proton torpedoes (9D - 1 hardpoint), a pair of extra-heavy gravity bombs ("eggs") (5D Capital - 5 hardpoints plus 5 hardpoint counterweight if only one EXGB present), 8 heavy rockets (10D - 2 hardpoints), 4 heavy space bombs (11D - 4 hardpoints), T-33 plasma torpedoes (12D vs. shields, 4D normal - 2 hardpoints) or any combination of the above. Typical combinations include:
Capital Ship Assault
Left: 1 EXGB (top)
Starship Interdiction 1 heavy space bomb (bottom)
Right: 2 T-33 plasma torpedoes (top)1 proton torpedo (top)
1 heavy space bomb (bottom)
1 heavy space bomb (bottom)
Left: 5 concussion missiles (top)
Capital Ship Defense 2 heavy rockets (bottom)
Right: 5 concussion missiles (top) 4 proton torpedoes (bottom)
Left: 5 proton torpedoes (top)
Planetary/Space Heavy Assault 4 concussion missiles (bottom)
Right: 5 proton torpedoes (top) 4 concussion missiles (bottom)
Left: 1 EXGB (top)
4 concussion missiles (bottom)
Right: 1 EXGB (top) 4 concussion missiles (bottom)
K-Wing Starfighter - d20 Stats
Craft: RFS' B-72C K-wing Heavy Bomber; Class: Starfighter; Cost: 225,000; Size: Tiny (13.6m length); Initiative: +6 (+4 crew, +2 size); Crew: 2; Passengers: 0; Cargo Capacity: 25 kilograms; Consumables: 1 Day; Hyperdrive: None; Maximum Speed: Ramming (9 squares); Maneuvers: +5 (+2 size, +4 crew, -1 engine quality); Defense: 22 (+2 size, +10 armor); Hull Points: 180; Shield Points: 80; DR: 5.
Weapon: 18 Ordnance Hardpoints; Fire Arc: Front; Attack Bonus: +12 (+2 size, +4 crew, +6 fire control); Damage: Special; Range Modifiers: PB -2, S +0, M -2, L N/A.
Notes: The K-wing can be fitted with up to 18 concussion missiles (7d10x2 - 1 hardpoint), 18 proton torpedoes (9d10x2 - 1 hardpoint), a pair of extra-heavy gravity bombs ("eggs") (5d10x5 - 5 hardpoints plus 5 hardpoint counterweight if only one EXGB present), 8 heavy rockets (10d10x2 - 2 hardpoints), 4 heavy space bombs (11d10x2 - 4 hardpoints), T-33 plasma torpedoes (12d10x2 vs. shields, 4d10x2 normal - 2 hardpoints) or any combination of the above.
Notes: The K-wing can be fitted with up to 18 concussion missiles (7d10x2 - 1 hardpoint), 18 proton torpedoes (9d10x2 - 1 hardpoint), a pair of extra-heavy gravity bombs ("eggs") (5d10x5 - 5 hardpoints plus 5 hardpoint counterweight if only one EXGB present), 8 heavy rockets (10d10x2 - 2 hardpoints), 4 heavy space bombs (11d10x2 - 4 hardpoints), T-33 plasma torpedoes (12d10x2 vs. shields, 4d10x2 normal - 2 hardpoints) or any combination of the above.
Typical combinations include:
Capital Ship Assault
Left: 1 EXGB (top)
Starship Interdiction 1 heavy space bomb (bottom)
Right: 2 T-33 plasma torpedoes (top) 1 proton torpedo (top)
1 heavy space bomb (bottom)
1 heavy space bomb (bottom)
Left: 5 concussion missiles (top)
Capital Ship Defense 2 heavy rockets (bottom)
Right: 5 concussion missiles (top) 4 proton torpedoes (bottom)
Left: 5 proton torpedoes (top)
Planetary/Space Heavy Assault 4 concussion missiles (bottom)
Right: 5 proton torpedoes (top) 4 concussion missiles (bottom)
Left: 1 EXGB (top)
4 concussion missiles (bottom)
Right: 1 EXGB (top) 4 concussion missiles (bottom)