Mortar? What is it?

[Shell Shifter]

Picked this up at a tag sale ($2!!!). It was a bubba job so I got the glue off, polished and reassembled.
anyway, looks like the tail end of a mortar. Thoughts?

 

[pat]

bonjour, oui ça ressemble fortement à un empennage de mortier en coupe

 

[Shell Shifter]

Agree. Thank you.

 

[MINENAZ16]

Could be (cutted) from US 81mm HE M56, Smk M57, ILL M301, etc.

 

[Eggburt1969]

At a guess an M4A1 fin assembly which was commonly fitted with the M34 percussion primer (I'm not sure this one is an M34). M4A1 sectional diagram is from a sectional diagram of the M57A1 (see later text).




As such it may have come from these 81 mm US mortar bombs, or clones thereof: M56A1 high explosive; M57A1 smoke; and M301A1 illuminating. Earlier and later models commonly used different tail assemblies, such as the M4 (M56) and M158 (M301A3).