Hell, integrity arms on here has a non reciprocating left side charging upper thay doesnt have a rear charging handle. That should be good for no gas face
I have a 10.5" .223 that would gas you to death when you put a can on it.
SunDevil makes an adjustable gas key for $60 that lets you dial down the gas.
There is an allen screw in the back of the key that gives you 3 1/2 turns from full open to full off.
It only took about 1/3 the gas headed to my face to get bolt hold open on the last shot.
See pic below.