Nope, you, like the poor soul that this rifle was intended for, just have to hope the armorer had time to actually select the proper front sight (or break out his file) before the next air raid siren went off or he was drafted and rushed off to the latest conflict! (Not one of the Japanesemilitary's better ideas- by war's end skilled labor had been severly depleted in all industries, further crippling the war effort.)