Inter Ordnance, located in Monroe, North Carolina, imports new Romanian semiauto AKs and converts them to the Wieger design. Mainly, the conversion consists of replacing the fore-end, gas tube, buttstock and pistol grip, but the magazine well must first be enlarged to accept standard double-stack AK magazines. IO then installs the required number of U.S. 922r regulation parts and in the end has an AK variant faithful to the Wieger StG 940 design, except it’s in 7.62x39.
I didn't see anything in there about using the a US made mag as one of the 922r parts? If they do, you can't legally use a surplus AK mag.
If you take note that article which you quoted is from 2008. here is a quote from the SAR Feb 2010 article
“We have
very good barrels being made for us. Right
now the only imported parts are the bolt,
carrier, trunnion, and receiver cover, but
everything will be US made by the end of
the year (2009). We’re outsourcing some
things to certain local machine shops but
the goal will be having everything - every
screw, pin, bolt and nut - made and assembled
in our own facility. Proper space,
proper work environment. It will go together
like a jigsaw puzzle with all the tolerances
right.”
While initial production of I.O.’s STG utilizes
a combination of imported and American
made components, work is near completion on a 100% US made gun. “We
invested heavily in tooling to make the receivers
and many other parts ourselves right
here in the USA,” Uli told us.
The firearms production and
assembly area of I.O.’s sprawling
facility in a suburban industrial
park outside Charlotte, North
Carolina. I.O. is nearing the goal
of 100% American made parts for
its firearms.
if 90% parts are U.S made and as of now should be100% us made i don't see any problem with 922r. besides if you really want to find out you can always call I.O instead of speculate.