▁the ▁number ▁for ▁manufact ure ▁was ▁reduced ▁to ▁ 1 0 0 . ▁The ▁project ▁was ▁terminated ▁in ▁March ▁ 1 9 4 8 . ▁ ▁Quick ▁reference ▁ ▁Dem il itar ized ▁versions ▁Dem il itar ized ▁models ▁are ▁rendered ▁perman ently ▁in oper able . ▁Their ▁bar rel s ▁have ▁been ▁d ril led ▁out ▁to ▁destroy ▁the ▁rif ling . ▁A ▁steel ▁rod ▁is ▁then ▁inserted ▁into ▁the ▁bar rel ▁and ▁w eld ed ▁at ▁both ▁ends . ▁Sometimes , ▁their ▁bar rel s ▁are ▁also ▁filled ▁with ▁mol ten ▁lead ▁or ▁sol der . ▁Their ▁gas ▁ports ▁or ▁operating ▁system ▁are ▁also ▁w eld ed ▁closed . ▁Their ▁bar rel s ▁are ▁then ▁w eld ed ▁to ▁their ▁rece ivers ▁to ▁prevent ▁replacement . ▁Their ▁firing ▁pin ▁holes ▁are ▁w eld ed ▁closed ▁on ▁the ▁b olt ▁face . ▁As ▁a ▁result , ▁they ▁cannot ▁be ▁loaded ▁with , ▁much ▁less ▁fire ▁live ▁am mun ition . ▁However , ▁they ▁may ▁still ▁be ▁used ▁for ▁demonstr ation ▁or ▁instruction al ▁purposes . ▁ ▁Cop ies ▁and ▁post war ▁derivatives ▁ ▁Japanese ▁Type ▁ 4 ▁ ▁The ▁Type ▁ 4 ▁R if le , ▁often ▁referred ▁to ▁as ▁the ▁Type ▁ 5 ▁R if le ▁( J apan ese : ▁ 四 式 自 動 小 <0xE9> <0x8A> <0x83> ▁Y on - sh iki ▁j id ous you j y u u ), ▁was ▁a ▁Japanese ▁experimental ▁semi - autom atic ▁rif le . ▁It ▁was ▁a ▁copy ▁of ▁the