Other design improvements over the Model 1889 included a one-piece trigger and a two-piece firing pin to prevent the rifle from firing unless the finger lever was fully closed or if the locking lug were missing. With the Model 1894, Marlin removed the rear-locking lug, which extended down into the trigger guard and had a tendency to pinch the shooter’s fingers during rapid-fire cycling. With this design, Marlin simplified and strengthened the internal lever-action mechanism while continuing the practice of using a flat solid steel top receiver with side ejection. The Marlin 1894 was originally patented on Augby L.L. The new model also utilized a cartridge carrier that raised automatically, closing the end of the magazine after the head of the cartridge had passed into the carrier, thus preventing the next cartridge from entering the carrier and jamming the action. Internal upgrades included a locking lug and firing pin system that prevented discharge until the bolt was locked in place. The Model 1889 was chambered for the same cartridges as the 1888.
Marlin's design team believed that a solid-top steel receiver would be safer in the event of a hang-fire cartridge, and stronger than a top-eject frame of equivalent weight. The Marlin Model 1889 was the very first lever-action repeater to incorporate a flat solid steel top receiver with side ejection of spent cartridge cases. Hepburn (Lewis Hepburn), a Marlin firearms engineer. The designer and patentee of the Model 1888 and subsequent Marlin lever action rifles (including the Model 1894) up to the Model 1897 was L.L.
It was chambered in the WCF (Winchester centerfire) family of cartridges originally developed for the Winchester 1873 rifle. This was followed by the Model 1888 which was a top-eject action like the 1881 with several improvements, most important was the incorporation of a locking lug locking the breech. Marlin produced its first lever-action repeating rifle as the Model 1881, a strong but heavy design that could accept powerful large-caliber black powder cartridges similar to those used in single-shot designs used for buffalo, bear, and other big game hunting. Special style side ejector bicycle rifle (1902)
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