I remember when it came out, wanted one, but opted for something else..
poor mans m1 carbine....iver Johnson does make some guns, others are made by foreign makers under iver Johnson lic...
some had a wire folding stock I think
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if seller was closer....I would like to see it, but alas, it is far to Tallahassee
found this
After ww2 the M1 carbine was made by dozens of companies from (primarily) surplus parts. Iver Johnson eventually became the final manufacturer of carbines, they had outlasted or absorbed all other manufacturers. In the 60's they used all new parts, no real quantity of surplus was left. Included in the companies holdings were Plainfield mfg. and others that used non-milspec parts or receivers of their own "improved " design. Some worked better than others; Iver Johnson began to make guns out of stainless to attract new buyers as stainless guns were "new" on the market then and the M-1 was still wildly popular. Also offered were "coated" finish guns and chamberings other than 30 carbine with folding stock options and even the enforcer pistol.
Probably Universal Firearms. Sights look like a modified version they made that mimics a pistol sight picture. The op rod in the OP's picture is my basis.
IJ had mil op rod vs most of the universals had the type on this gun.
rear sight is fixed as well as front blade which is part of the front barrel band.