Mannlicher's Automatic Rifle Designs
Mannlicher introduced several automatic rifle designs that were unsuccessful, but ahead of their time. He introduced fundamental principles that were used by later designers, often successfully.
Mannlicher's Model 85 semi automatic gun used his recoil operated action originally developed in 1883; it anticipated the recoiling barrel system used later in designs like the German MG 34 and MG 42 machineguns, and the M1941 Johnson machine gun. The Model 85 would have fit the same tactical role as the American BAR or British Bren of World War II fame.
The Model 91 semi-automatic rifle was designed to use the 7.92x57mm Mauser cartridge and the Model 88 rifle clip. Like the Model 85 it was a recoil operated action like the later Remington Model 8 and M1941 Johnson rifle.
Mannlicher designed two semi-automatic rifles both called Model 93, one based on his turn-bolt rifle and the other based on his straight-pull rifle. The rifles had a recoil spring housing behind the bolt and the bolt locking lugs were angled, so the bolt started turning on firing, essentially a hesitation lock or delayed blowback much like the later Thompson Autorifle utilising the Blish lock. In this system there was no recoiling barrel nor gas piston as with other rifle-caliber autoloading designs, so the mechanism was simple, but ejection of fired cartridge casings was so fierce as to be hazardous to bystanders.
The Model 95 semi-automatic rifle was gas operated using a slide with the cocking handle on its side and gas piston at its front to operate the bolt, with the recoil spring operating on the slide. Loading was with the Mannlicher packet clip of cartridges inserted into the magazine from the top. These features were also used in the later U.S. M1 Garand rifle.
The Model 1900 semi-automatic rifle was also gas operated but used a short stroke piston with a camming lug that engaged the bolt to open it. The bolt was then carried to the rear by momentum with the recoil spring operating on the bolt. The US M1 carbine used a short stroke piston to impart momentum to a slide that opened the bolt, combining features introduced in the Mannlicher Model 95 and Model 100.
Read more about this topic: Ferdinand Mannlicher
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