Home Forums Hunting & Shooting AR and Tactical Rifles what would you chose for a longer range upper, and why?

I have both SBR and pistol lowers so I use it both ways as appropriate, but usually it's on an SBR lower. Standard carbine buffer and spring either way. I prefer to tune the gas system rather than swap buffers around. Since I made the barrel myself, I snuck up on the gas port size until it was right. If you're buying a barrel, I'd plan on some sort of adjustable gas block.

I do use a Bootleg adjustable bolt carrier to switch between suppressed and unsuppressed; the short barrel and larger case (compared to 5.56) produces a lot of gas.