I had no idea that the HK MP5 sub-machinegun is 50 years old now. Or that it has gone through so many design changes.
At the well stocked HK booth, there was a display case with various versions from years past.
Sorry about the glare and poor colour. They were all housed in a glass cabinet. No chance of laying them on the carpet to photograph!
This was cool, a cutaway version for training.