Examples
“In the middle of a plain, betwixt Orgon and this river, we met the coach in which we had travelled eighteen months before, from Lyons to Montpellier, conducted by our old driver Joseph, who no sooner recognized my servant at a distance, by his musquetoon, than he came running towards our carriage, and seizing my hand, even shed tears of joy.”
“It was the only weapon I had, either offensive or defensive; for I had left my sword, and musquetoon in the coach.”
“At length he recollected himself, and the cattle were stopt, by the assistance of the servant, to whom he delivered the musquetoon, with a significant shake of the head.”
“We set out from Lyons early on Monday morning, and as a robbery had been a few days before committed in that neighbourhood, I ordered my servant to load my musquetoon with a charge of eight balls.”
“Fire was speedily obtained from one of their guns, and Hobbie was already advancing to the pile with a kindled brand, when the surly face of the robber, and the muzzle of a musquetoon, were partially shown at a shot-hole which flanked the entrance.”
“Cromwell's Ironsides and a long-faced, high-hatted Puritan cavalry-man, both on horseback, and a third on foot, with _musquetoon_ on shoulder.”
The Continental Monthly, Vol. 2, No 3, September, 1862 Devoted to Literature and National Policy.
“He had a brace of pistols in his belt, a musquetoon under his feet, his naked sword behind him.”
Blackwood's Edinburgh Magazine, Volume 62, Number 361, November, 1845.
“At one of the windows of the palace, a tall man in a flowing white robe, with a naked sabre in one hand and a musquetoon in the other, which, from the smoke still issuing from its muzzle, had apparently just been discharged, stood defending himself desperately against a band of fierce and bearded ruffians, who swarmed up a rope ladder fixed below the window.”
Blackwood's Edinburgh Magazine — Volume 55, No. 342, April, 1844
“Immediately (and ere I might shoot again) his fellows dragged him down, and lying prone on their bellies let fly wildly in my direction with petronel and musquetoon.”
“Said he, setting a musquetoon ready to hand and glancing at the primings of his pistols.”
Lists
These user-created lists contain the word ‘musquetoon’.
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-oons (once of more than one syllable)
Originally this list was to contain multisyllabic words that end in "oon," but as you can see from the comments, all hell broke loose.
doubloon, poltroon, spittoon, patroon, dragoon, bassoon, platoon, typhoon, rangoon, maroon, pontoon, monsoon and 96 more...
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Historical Military Terms of Interest
Many (if not all) of these terms were selected from A pocket dictionary, for military officers, containing a definition of all the tactical terms now in use, with other matter belonging to the art ...
zig-zags, yeoman, xerxes, xeiff, xenophon, worm, watch-word, windage, wheeling, wad-hock, wadding, volley and 242 more...
Tweets
Looking for tweets for musquetoon.

bilby I'd swear this was the kind of blunderbuss found in comics and the like which, when someone stuffs any kind of foreign object in it, blows up in your face and leaves you covered with soot. Oct 10, 2008
chained_bear Also spelled musketoon.
"a kind of short thick musket that carries a ball of iron weighing 5 ounces, or one of lead weighing 7 1-2 seven and a half ounces." (citation in Historical Military Terms list description) Oct 9, 2008