Testing on a variety of other aircraft revealed very unsatisfactory performance from the guns and their development was canceled. The designers were arrested on 15 May 1941 and executed on 28 October 1941. On 3 December 1940 the VVS ordered that the 41st Fighter Regiment ("istrebitel'nyy aviatsionnyy polk"), based at the Crimean town of Kacha, was to conduct operational trials on the I-200 and that they were to be transferred to the 146th Fighter Regiment at Yevpatoria, also in the Crimea, for pilot training after the conclusion of the trials. By 22 February 1941, 89 had been issued to regular fighter units, notably the 89th Fighter Regiment at Kaunas, Lithuania and the 41st Fighter Regiment at Białystok, Poland, both places under Soviet occupation since 1939–40. On 1 June 1941 they were spread out a bit more, with 31 in the Baltic Military District, 37 in the Western Special Military District, one in the Kiev Military District and eight in the Odessa Military District for a total of 77 on hand, of which only 55 were operational. An additional eight MiG-1s were assigned to the Soviet Navy. However, only four pilots were trained to handle either the MiG-1 or the MiG-3. Little is known of the performance of the MiG-1 in combat as most were likely destroyed during the opening days of Operation Barbarossa. However, one was still in the inventory of the VVS as late as 1944 when it was recorded as withdrawn that year.