Way back when, When the "Shot Show" was held at the main Los Angeles Police Department, A couple of friends and I went.
This was my first (most peoples) exposure to the Austrian, AUG Bullpup which was not released for sale yet. It was MOST people's first exposure to the Bullpup design, even though there were already one or two designed. I don't think any/many ever made it to the sales counter before the AUG.
It came in two barrel lengths, one a "Police" length of 16" (as I recall), and a civilian length of 21" (as I recall). I got in line. About two months later, I received a phone call to pick up my new AUG.
It was about 28" long with the long barrel. The scope was only a 1.5x magnification. The original guns were designed to shoot only the .223 cartridge. They've been redesigned to shoot a hand full of different cartridges currently.
Fun gun to shoot, especially since this was a very early shipment, and VERY few were around to buy. Not even gun shops had them in stock yet. Got LOTSA attention the couple of times that I went to outdoor ranges, so I mostly stayed with friends in the foothills of Saugus CA. for most of my shooting.
The bolt, the barrel/sight, and the various springs, and pins were about all that was a metallic material. EVERYTHING else was plastic, even the hammer.
Mike