I have three uppers from PSA with stainless barrels. One 18" Wylde with freefloat, supposedly a "match" barrel whatever that means, and two 16" 5.56 mid-length gas Freedom uppers. Been awhile since I had my LE6920, but I don't think it shot anywhere near as good as these stainless PSA uppers. The 16" PSA uppers are not freefloated, but they shoot surprisingly well. I think PSA lists them as A2 profile.
Never tried their nitride or CHF barrels but I'm curious about their stainless pencil barrels.
Whatever you get, I'd suggest getting a good trigger if the rifle or lower comes with a standard G.I. or even enhanced trigger.
