Mongo's Machine Gun Pages Swedish Kg m/37 BAR
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The first Swedish BARs were made by Colt between July 1921 and August of 1922. These guns were all of the commercial Model 1919 with a few modifications required by Sweden. They where chambered for the Swedish m/94 6.5mm cartridge (known as the 6.5X55 Swedish Mauser in the US), had the straight pistol grip, a partially curved magazine, hooded front sight, and a folding bipod attached to the gas tube. Total number of m/21 guns produced by Colt was 703. The Swedish BAR was then produced under license by Carl Gustafs Stad Gevars Faktori. Carl Gustafs produced 7,489 more Kg m/21 (Kulsprute Gevar; literally "bullet spraying rifle") guns before changing over to the later Kg m/37 variant. In 1935 the Swedes came up with a clever solution to modify the BAR for quick change barrels. The Swedes added a quick change mechanism on to the  front of the receiver that utilized the existing receiver barrel threads. The new quick change barrel would slide inside the new mechanism and would lock into place via and interrupted thread. The cleverness of the design allowed existing m/21 BARs to be converted to the new quick change arrangement. The change was officially adopted as the Kg m/37 and Carl Gustafs began production of this type. Many of the existing Kg m/21 BARs were converted to m/37 (as was mine). Production of Kg m/37 BARs totaled 15,398 when production ceased in 1944. After WW2, the Swedes created an experimental belt fed version of the m/37 but it was never fielded and only one was produced. The FN MAG58 replaced the m/37 in Swedish military service (which happens to have a toggle action derived from the BAR). Sweden kept the m/37 in service until the 1980s when it was fazed out and scrapped. Sarco bought up some of the m/37 scrap and sold it on the US market. Several m/37 style of BARs have been built on US made receivers.
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