The Type 3 heavy machine gun , also known as the Taishō 14 machine gun, was a Japanese air-cooled heavy machine gun. The Type 3 heavy machine gun was in a long-line of Japanese Hotchkiss machine gun variants that the Imperial Japanese Army would utilize from 1901 to 1945.

The 7×57mm Mauser is a first-generation smokeless powder rimless bottlenecked rifle cartridge. It was developed by Paul Mauser of the Mauser company in 1892 and adopted as a military cartridge by Spain in 1893. It was subsequently adopted by several other countries as the standard military cartridge, and although now obsolete as a military cartridge, it remains in widespread international use as a sporting round. The 7×57 Mauser was a popular stalking cartridge and sporting rifles in this chambering were made by the famous British riflemakers, such as John Rigby, Holland and Holland, Westley Richards and others. British cartridge nomenclature designated caliber in inches, and the cartridge was known as the .275 bore after the measurement of a 7 mm rifle's bore across the lands. The cartridge is sometimes erroneously referred to as the ".275 Rigby", However, the original John Rigby & Sons never referred to the cartridge by that name, nor did any of UK gun trade; the Rigby association is a misconception attributed to modern American gun writers.