Haubits FH77 followed by Archer Artillery System
Fälthaubits 77 (Swedish "Field Howitzer 77") or FH77 is a Swedish 155 mm howitzer, developed and manufactured by Bofors. It is also colloquially known as the Bofors gun in India. There were several versions, the original (sometimes referred to as Haubits 77 A) with a 38 calibre barrel and sliding block mechanism, the export version FH77 B version with a 39 calibre barrel and an interrupted ogival screw breech. For the demonstrator of the Archer Artillery System, some FH77A were modified into FH 77 AD L/45, while the series production were FH77Bs rebuilt into FH77  BW L/52. The carriage was also used for the "12 cm rörlig kustartilleripjäs m/80 KARIN", used in the Swedish coastal artillery.Vehicle-mounted variant
Archer Artillery System – self-propelled FH77B-version with a 52 calibre gun mounted on the chassis of a Volvo articulated hauler.