The calculated distance (air line) between Krasnogvardeyskoye and Armyansk is approximately 51 miles respectively 82 kilometers.
By car or train, the actual journey to Armyansk is certainly longer, as only the direct route (as the crow flies) between Krasnogvardeyskoye and Armyansk has been calculated here.
Air line (approximately)
82 kilometers
44 nautical miles