This Gun is a Type 99
Designed in 1939, then produced and fielded from 1941 to 1945, the Type 99 was the most common Imperial Japanese service rifle of World War II and second most produced imperial rifle with 2,500,000 built. Significant changes are the improvement of the rear sight form transitioning from a V-notch type like those on a Type 38, to an aperture, the front sight blade was renewed to a triangular shape, chrome-lined barrels were used, and on earlier productions, the rear sight was equipped with anti-aircraft calipers.
Sub-variations included a long rifle (approximately only 38,000 made), and short rifle; former being 1258 mm in total and latter being 1118 mm. The short rifle also varied in quality from initial, intermediate, to last-ditch.
This is a copy and past.