Assertion: fragmentation grenade | /r/HasProperty | fitted with tail-fin assembly
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text: Introduced in 1931, the Type 91 fragmentation grenade could be thrown by hand, fired from a cup-type grenade launcher (the Type 100), discharged by a lightweight mortar-like projector (the Type 89 grenade discharger, or knee mortar). or fitted with tail-fin assembly and fired from a spigot-type rifle grenade launcher.