03 August 2026

Stuff You Find

While calculating the stats for the rounds for the M67 90mm reckless ryetuful, I found an oddity.

The M591 HE round is an 81mm mortar round (looks like an M374 round) with a sabot to shim it up to 90mm stuffed into a 90x427mmR case for use in the recoilless rifle.  They even left the fins on!

That is relentlessly pragmatic.

The reference I have says it's XM591, so I am not even sure it went into service.

Update: Willard remembers there being HEAT rounds (M371A1) in the ammo bunkers when he was in 2-75 Rangers and heard from troops back from 'Nam using the multi-flechette APERS rounds (M590) but nary a mention of an HE round.

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