Bolt action AR15 uppers

Do they make any bolt action uppers that fit a AR15 lower besides the 50 BMG

I’ve been wondering the same thing lately. This what I’ve found so far. The Kalikey just takes your existing gas system out of the mix and makes it a straight pull manual bolt. The Uintah requires a proprietary barrel that has a modified barrel extension and no gas port. I was wondering what would happen if I just turned off the gas on my side charger AR. Would it act like a straight pull bolt gun?

https://kalikey.com/information/about/

8/19/19 update
Apparently it’s pretty easy if you already have a side charger. I run Bear Creek Arsenal side charger uppers on all of my AR’s. Being a lefty the right side handle works well for me but shouldn’t be an obstacle for right handers.

Great uppers for the money.