The Type 100 (sometimes called the Type 0) was one of the initial Japanese experiments in paratroop rifles. Manufactured from standard Nagoya Arsenal Type 99 rifles, the Type 100 used a set of interrupted lugs at the chamber to allow the rifle to be broken into two short sections. Only a few hundred of these were manufactured for testing, and ultimately the Type 2 design (with a locking wedge) was adopted instead.

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