Manufactured in 1929, this is a rare Swedish-made variant of the famed 1918 Browning Automatic Rifle. Part of the first generation of relatively lightweight automatic weapons intended for use by small units, the BAR set a standard for the highly mobile infantry machine gun that stood up for many wars, and found a home in many arsenals through both direct export and licensed local production. Sweden was an adopter, taking up their 1921 variant as made both in Belgium by FN and at home by the noted Carl Gustaf firm, like this one. Most of the "guts" of the Swedish 1921 are instantly recognizable as the BAR, with most of the changes being ergonomic in nature, such as the addition of a full pistol grip and the change of the selector switch from a low profile lever to a more prominent thumb switch that can be reached by the right hand without breaking grip. Blade front and folding ladder peep sights with fixed battle sight, a threaded muzzle with thread protector, folding bipod with hinged feet, and finely checkered forearm, grip and buttstock. The top of the receiver bears the Carl Gustaf markings along with the date of "1929", and matching numbers are present on multiple components. The selector switch is marked "P" (semi), "A" (full) and "S" (safe), with a variant on the spring loaded safety lockout of the 1918; disengaging the safety cannot be done unless the lockout is depressed, but the lockout only provides extra resistance and tactile feedback before flipping over from automatic to safe. The magazine is reconfigured to accommodate the Swedish 6.5mm rifle round, with a mild curve to accommodate the rim.