Series 37 Type 99 Arisaka. This particular serial number range does not come with the monopod, dust cover or AA sights. However, it did come with a chrome lined bore. This is certainly not a substitute standard type 99 (a.k.a. Last Ditch). Manufacturer is Tokyo Juki Kogyo which most people know as Mazda. Year of production is somewhere between 42 and 43.
三八式歩兵銃 - ARISAKA M1905
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BAR M1918 Browning automatic rifle (early type, # 260 367)
Arisaka Type 99 http://candrsenal.com/rifle-japanese-arisaka-type-99/
arisaka rifle type 99 | ... Series Japanese Type 99 Arisaka Rifle With A Type 2 Grenade Launcher