While listed as in production in 2011, by 2013 the M-18 Spartan was no longer advertised by Magni Gyro as part of their product line.[2]
The M-18 was the smallest autogyro offered by the company. It features a single main rotor, a single-seat open cockpit with a windshield, tricycle landing gear with wheel pants and a twin cylinder, air-cooled, two-stroke, dual-ignition 640NaN0 Rotax 582 engine in pusher configuration.
The aircraft fuselage is made from TIG-welded 4130 steel tubing, while the cockpit fairing is fibreglass. Its 7.31NaN1 diameter rotor has a chord of 221NaN1. The propeller is a three-bladed carbon fibre, ground adjustable type. The supplied fuel tank holds . The aircraft has an empty weight of 1670NaN0 and a gross weight of 3000NaN0, giving a useful load of 1330NaN0.