Been wanting a suppressed sbr for a while. I currently have RRA coyote hunter that I use for hunting. This is what I'm wanting to build. Wanting to build something that I can play around with and go shoot 1000 rounds or so and not spend a ton of money. So I thought about building something like this in .22lr. Wanting to have a 5-6 inch barrel plus the length of the suppressor. Questions: If I build a dedicated upper and get it stamped, am I able to still put my hunting upper on it or is only able to run the sbr upper on it? What does it take to build this kind of upper parts wise? What is the shortest length barrel I can get? Im sure I have more questions, I'll post em I get them.