Welcome to the world of unobtainium & ultra rare cool things.
I have two left, one with no sights and one with fixed sights. I was going to keep these ones for myself but decided to list them.
We were able to acquire a very limited number of used H&K 416 10.5" Uppers along with the stock, buffer tube, bcg and grip.
They are all in good shape but they are used and have use usage marks.
https://theammosource.com/h-k-1/