Mystery Munition of the Month - December 2014

Article by UXO Guest Author Bob Parsons, Former USAF EOD Technician, current civilian UXO Technician.

Admit it... we've all been there, digging around In the dirt with tools better suited to a flower garden than the red Georgia clay or hard pack you find yourself in now. You've dug it up and now it's yours, but what is it? Our first reaction is often 'what the hell is that?' followed soon after with 'is it even ordnance related?'

That's where our crew was once again and yes, I admit, not the first time for me (or anyone else being honest). It's in my hand 'cause there's obviously no explosive hazard, and the exam begins. Looks like cheap pot metal mostly but there are a couple steel bars too, plus a stainless steel plate on the base. Seems poor construction idea, what with dissimilar metals galvanic corrosion is assured and obvious (save the stainless plate). A couple through and through holes, a half round depression, and that's about all there is. First impression is manufacturing item or maybe vehicular... but being in the middle of a burn/demo area raises doubts in that realm.

And in the interest of full disclosure I must also admit I was 'one-upped', a Marine on the dig crew put forth type and function (good job Val D.!). That turned out to be completely accurate, missing only nomenclature. Not the first time I've had a Marine ID some odd item/part and where it came from... sharp troops!

Taking his info as a starting point the next step was a long and convoluted internet search. An image search using the pics was fruitless so it became a test of will, plodding along until a match was found. Must also give kudos to the inert-ordnance guys out there, some pretty good info, though not all 100% accurate, as with anything in our line of work... the idiom 'take it with a grain of salt' needs to be employed frequently!

And so.... what is it?

Think you know? Post your answer as a comment to this article - see comment button below.

Comments
h.m."Chip"harman's Gravatar Methinks that this whatzit of the month may be what's left of the bottom of a BLU-18 or M-43 dispensed submunition grenade without wings,fuse,exploding ball or delivery dispenser or projo. Regards, HMH
# Posted By h.m."Chip"harman | 12/12/14 2:30 PM
Bryan's Gravatar M39 sub munition....pretty lil butterfly lost its wings :)
# Posted By Bryan | 12/12/14 4:47 PM
Bob Gravett's Gravatar It is definitely the: USA SM M 39 (M39 Grenade minus its arming vanes) The photos clearly show the Stainless Steel Striker Plate with perforations, the curved 'Kill Mechanism' Ejection chamber, the two posts with rusted steel pins where the arming vanes pivot.
# Posted By Bob Gravett | 12/13/14 8:19 AM
h.m."Chip"harman's Gravatar Another mystery may be, How did it/them get into the demo burn pit?
# Posted By h.m."Chip"harman | 12/15/14 7:06 PM
R. Paoletti's Gravatar Bryan and Bob are right. It is a M39, General Purpose, Anti-Personnel, Grenade. Expelled from a 105mm, M444. The striker plate was the give-away for me too.
# Posted By R. Paoletti | 12/29/14 12:49 PM

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