Yep, that addy will take you to the Federal Arms Corporation website.
Their Arsenal of Bulgaria guns are the SLR-101 single stack mag version, and the converted to double stack SLR-101.
They also sell the Arsenal Inc SA M-7 series of rifles, which are made here in the USA, and are licensed by the Arsenal of Bulgaria Company. They are double stack mag shooters, and were built that way from scratch (no modification needed during assembly). All components are new (as with the SLR-101's), and the receiver and fire control groups are manufactured here in the US using the proper forged and milled method used by the Bulgarians. The SA M-7 series are a bit pricier, but again, they are not converted single stack guns. Instead, they are built from scratch to be what they are.
Arsenal Inc of Nevada is the first AK builder here in the U.S. to be licensed by a true former Com Bloc AK builder (Arsenal of Bulgaria).