The Mirage has the same layout, landing gear and structure but has a span reduced by 1.00 m (3 ft 3 in), is 170 mm ( 6.7 in) longer and is 34 kg (75 lb) heavier.

Behind the cabin the fuselage is slender and carries a low set, straight tapered tailplane with horn balanced elevators.

The Mirage RS/L version had a Jabiru 2200 and one aircraft (D-MPCJ) had a two-cylinder, 72 hp Swiss Auto SAB 430 turbocharged car engine, which saved 30 kg (66 lb).

The first production aircraft also used this engine but had some small horizontal control surface modifications plus the addition of a horn balance to the rudder.

[1] The GX has been the current production model since 2006 and features folding wings and monocoque carbon fiber construction.

There were improvements to the instrument panel and interior and a new chromoly steel tube landing gear, which replaced the earlier composite undercarriage, is retrofitable to older models.