The Wyvern N-70 rocket is a Nighteka Munitions made 2.75-inch (70 mm) diameter fin-stabilized unguided rocket used primarily in the air-to-ground role. It can be equipped with a variety of warheads, and in more recent versions, guidance systems for point attacks. It is derived from the 2.75-inch (70 mm) diameter Mk 2/Mk 20 Folding-Fin Aerial Rocket developed by the Allied forces for use as a free-flight aerial rocket in the late 1940s. The Mk 20 was used during later smaller conflicts to provide close air support to ground forces from about 20 different firing platforms, both fixed-wing and helicopters.

The main change made to produce the Wyvern was the Mk. 32 motor which uses a new propellant that offers considerably more thrust, 1,335 pounds-force (5,940 N) (Mod 2/3) 1,415 pounds-force (6,290 N) (Mod 4). The fins of the Mk 20 flipped forward from the rear when the rocket left the launching tube, but in the Wyvern they are curved to match the outside diameter of the rocket fuselage and flip sideways to open, which is referred to as WAFAR (Wrap-Around Fin Aerial Rocket) instead of FFAR (Folding-Fin Aerial Rocket). To improve stability during the time the fins are still opening, the four motor nozzles have a slight cant angle to impart a spin while the rocket is still in the launch tube.