The AS-6 V1 was built in January 1944 by Mitteldeutsche Motorwerke, with final assembly at the Flugplatz-Werkstatt workshop located at the air base in Brandis, Germany.

During taxi tests, it was found that the tail needed extensive modifications in order to handle the 240 hp of the As 10C-3 engine.

[4] Sack blamed the problem of insufficient angle of attack, but Baltabol believed it to be lack of power, and suggested that the AS-6 be fitted with a 2,000 hp Daimler-Benz DB 605 engine from a Bf 109.

Sack, convinced it was the angle of attack that was the problem, relocated the landing gear eight inches aft.

[4] Another attempt was made with similar results, but during the short hop it was found that the torque from the As 10C-3 caused stability problems.

The aircraft, nicknamed Bussard (Buzzard) by the JG 400 pilots, made one final flight attempt, this time with Oberleutnant Franz Roszle at the controls.

[3] The AS-6 was damaged in a strafing run before Sack had a chance to make further improvements, and the aircraft was likely scrapped soon afterward.