Original U.S. Cold War INERT M31 HEAT Anti-Armor Rifle Grenade Trainer - 66mm U.S. Equipment as is the chin strap

as is the chin strap except for the end fittings

the sparcely decorated iron head on this example measures 4" X 2 1/2" with a an almost semicircular cutting edge

The buckle featured on this sling is the unmarked 2nd Type with an integrated spring

while the other has a more standard two bendable attachment tabs

The liner itself shows only a bit of scuffing around the rim

Original U.S. Cold War INERT M31 HEAT Anti-Armor Rifle Grenade Trainer - 66mm U.S. Equipment as is the chin strapOriginal 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