Prototype Friberg/Kjellman Flapper-Locking Semiauto Rifle
This video explores the prototype Friberg/Kjellman Flapper-Locking Semiauto Rifle, a rare Swedish firearm from the turn of the 20th century. The design's origins trace back to a Swedish Lieutenant Friberg's 1870 patent for the flap-locking system, which was impractical with black powder but viable with smokeless powder. Kjellman built the rifle and some machine gun variants at the former Nordenfelt facility in Sweden, attempting to secure international military contracts. Approximately 50 examples were produced in various calibers and configurations, but the design never entered mass production. The rifle utilizes a unique lever arm for bolt operation without a recoil spring, a mechanism that is functional but counterintuitive by modern standards. The description also promotes the Forgotten Weapons Patreon and merchandise.












