The AGS-17 is a heavy infantry support weapon designed to operate from a tripod or mounted on an installation or vehicle. The AGS-17 fires 30 mm grenades in either direct or indirect fire to provide suppressive and lethal fire support against soft skinned or fortified targets.
The weapon uses a blowback mechanism to sustain operation. Rounds are fired through a removable (to reduce barrel stress) rifled barrel.
Additional Information: en.wikipedia.org/wiki/AGS-17