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Fälthaubits 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 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 KARIN, used in the Swedish coastal artillery.