If I've ever owned anything HK, I don't remember. But I've experienced a few.
On one occasion many moons ago, my Ordnance unit was ordered to the range. Seems the HK folks had brought a bunch of guns and a truck load of ammo for us to try out. No explanation. But they brought everything they had available. Rifles, pistols, subs, suppressed, full auto, the whole works. And we were encouraged to extensively try everything out, just to tell them what we thought. No other strings were attached. That was a memorable day.
A couple things I remember...
First, they brought out a scoped rifle. I don't even remember which one. The presenter fired at a bullseye target, hitting it dead center. He then threw a couple levers on the scope mount, removed the scope, and threw the scope downrange as far as he could. He retrieved the scope, remounted it, and fired again at a bullseye target. Hit it dead center.
They brought out another, or maybe the same gun. Handed one of the Troops a nasty coarse file, and asked him to scratch the finish on the rifle. The Troop hesitated, but they said, really, go ahead. Made a couple heavy strokes of the file on this gun, and the finish remained unscratched.
Full auto was nothing new to me, but I had zero experience with suppressors. They brought out a suppressed sub-gun. I've never experienced such a quietly suppressed gun, even to this day. The sound of the bolt operating was louder than the report of the cartridges.
I was obviously impressed with every product they offered.