| Year | 1942 |
| Weapon Type | Multiple Rocket Launcher |
| Origin & Designer | Germany/Rheinmetall |
| Numbers Produced | 2.626 |
| Crew | 4 |
| Calibre | 210mm |
| Elevation | -5° to +45° |
| Traverse | 24° |
| Breech | [@breech] |
| Recoil | [@recoil] |
| Gun Sight | [@gun_sight] |
| Gun Mount | [@gun_mounts] |
| Carriage | Split Trail |
| Trailers | [@trailers] |
| Gun Shield | [@gun_shield] |
| Armoured Plate | [@armoured_plate] |
| Barrel Length | 1.300mm |
| Overall Length | [@length] |
| Width | [@width] |
| Height | [@height] |
| Weight | 605 kg |
| Round Weight | 112.6 kg (Single Rocket) |
| Muzzle Velocity | 320 m/s |
| Feed | [@feed] |
| Magazine Capacity | [@magazine_capacity] |
| Practical Rate of Fire | [@practical_rate_of_fire] |
| Rate of Fire | Five Rockets in Eight Seconds Fifteen Rounds every Five |
| Maximum Rate of Fire | [@maximum_rate_of_fire] |
| Maximum Ceiling | [@maximum_ceiling] |
| Maximum Ground Range | [@maximum_ground_range] |
| Maximum Range | Minimum Range: 500m Maximum Range: 7.850m |
| Armour Penetration | [@armour_penetration] |
| Traction | Motorised (Sd.Kfz. 10) |
| Variants | [@variants] |
| Notes | The 21cm NbW 42 consisted of five barrels and each fired a 210mm rocket. Like the 15cm NbW 41, it utilised the PaK 36 carriage. It had special liner rails that allowed it to fire 150mm rockets. It was used in a similar role as the 15cm NbW 41. |