Hi,
The 3rd Wisc Cav was equipped with the .54 cal Merrill carbine They carried a variety of pistols--1858 Remingtons, 1860 Colts, and Lefaucheux 1854 12mm pinfire pistols. I have copies of the 3rd Cav men posing with Colts, LeFaucheuxs, and a Merrill carbine.

I'm uncertain as to what sabre they carried---probably 1840 and 1860 models.

The 3rd Wisc Cavalry Merrill carbines are documented in "Carbines of the Civil War 1861-1865" by John D. McAulay and other reference
books as well.

Hope this is of service to you.

John T Hughes