I have a Syrac adjustable gas block on a Syrac mid-length 16" upper. The lower has a carbine buffer. The BCG is a semi. I've adjusted the gas block so it locks back on an empty mag, plus 1/2 turn to be safe. It is very "smooth" shooting compared to my other upper and different friends' ARs.
With the same BCG and the same lower, my other upper with a 16" barrel but a carbine gas has much more recoil.
The gas block makes a big difference.
I know things would smooth out with a heavier buffer with the carbine upper, but would I gain anything going to say, an h-2 with the mid-length upper that already had the gas block adjusted, or is it already as good as it gets?
Rather than drop the $40 on a new buffer and shipping to try it, I'm hoping someone here has already used a similar setup.
