I had a near-terminal case of the SIGness, back in the 80's/early 90's. If it was imported, I had it. I also had some that really weren't. Here's an old one. First 550-sniper imported into the USA. It went thru the BATFE evaluation process, and had no import-marks[the only one]. I believe 14 legit/complete rifles were imported. It was a convoluted process to get everything in country. All the optics, bi-pod, case, and accessories were imported after approval. If rejected, there would have been a bunch of wasted money on duties and taxes. It was a year-long process. All the money was paid up-front for the pkg. That particular rifle was serial #85. The mirage band was never attached, as it was elastic and I didn't want to stretch it out. I let everybody shoot this rifle when I was at the range. The look on people's faces, was worth the price of admission.