Kammarkarbin: also known as "gallery carbine". Unique serial numbers prefixed by K. Total number produced is unknown, with the highest reported serial number being K.193 currently in a private collection in the United States. One has been reported in Switzerland. Carbine K.91 is in the Carl Gustaf factory museum in Sweden. Other differences from the standard m/1894 carbine include the stock being dyed black. The rifling rate of twist is about 4 times faster than the m/1894 carbine due to the unique bullet and much slower velocity of the special cartridge intended for this carbine. The only two receiver dates noted so far are 1898 and 1901.