This rare modification was invented by a Swedish engineer in 1938, prior to the Nazi's invasion of Poland in 1939, the start of World War II. With simple adaptations of the principle, it is possible to modify any military Mauser, Springfield, Enfield or Mannlicher into a semi-automatic weapon. The rear portion of the body of the rifle is removed and a guide bar is welded to the body to control the bolt movements. The bolt has the unaltered extractor and extractor ring. The handle is shortened. In the same threaded hole originally used by the firing pin, a hollow screw is inserted and welded into position. The screw serves to turn and advance or retract the bolt. As the firing pin passes through the center of this screw. It cannot reach the cartridge unless the bolt is completely advanced and locked, eliminating the risk of premature firing. When the last round is fired, the bolt stays open. There are no gas outlets and that doesn't diminish the precision or velocity of the bullet. The rifle uses standard army ammunition in magazines which is enlarged to hold 10 rounds. The barrel is standard slightly modified for attaching a sliding gas chamber and a fixed recoil spring tube. The trigger mechanism is similar in design to the standard military, except that the trigger bar is lengthened somewhat and has a movable sear. The sear is designed so that the rifle is strictly semi-automatic. The rifle requires no special care outside of the standard practice for military rifles and can be field striped with a cartridge. These Snabb modified rifles are well balanced with a simple, rugged design. The mechanism is totally protected from rain, sand and dirt. The stock is American walnut with a thumb hole grip, safety lever mounted directly above the trigger, steel buttplate with compartment and a hand guard. The rifle retains the standard markings on the receiver, front and rear sights. The rifle is complete with lengthy typed copies of the history of the rifles, description, part by part), test firing results, photo of the rifle and some documents in French.

Period experimentall modified. Rifle has a 50-50 mix of blue finish and grayish patina. There is a small amount of pin prick type pitting on the receiver. The magazine, bolt assembly and tube appear to have been left bright and show a brownish gray patina with some minor oxidation. The buttplate shows moderate to heavy oxidation. The stock is good with exception of a fill repair on the left front of the forearm and on top of the buttstock at the receiver, otherwise a few scattered minor dings, dents and scratches. The original markings are clear. The action is fine.