Original U.S. Vietnam War INERT Practice M31 HEAT Anti-Armor Rifle Grenade Trainer Dated 1963 - 66mm Category_Martini-Henry Parts while the "turned-down" carbine bolt

while the "turned-down" carbine bolt handle is non-matching and only partially legible

which were solid brass

Most of the uniform items produced in the years leading up to WWII were carried over into service during the war until more updated versions of them were produced

The translation goes on to mean

it is unlikely parts were even available

Original U.S. Vietnam War INERT Practice M31 HEAT Anti-Armor Rifle Grenade Trainer Dated 1963 - 66mm Category_Martini-Henry Parts while the "turned-down" carbine boltOriginal Item: Only One Available. Totally inert and demilitarized according to BATF guidelines with hollow body and deactivated propulsive charge. This rifle grenade round cannot be converted to an explosive device, it is just a trainer. Not Available For Export The M31 HEAT is a fin stabilized anti tank rifle grenade designed in the late 1950s to replace the Belgian ENERGA rifle grenade which was adopted by the US Army and US Marines as an emergency