10.5" Brownells BRN 180 .223 Wylde upper on a Bushmaster SBR lower. This is temporary until the stamp comes back on my New Frontier folding lower then it will get that lower and magpul UBR side folder.
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It does well. I'm running a 30 cal specwar can on it so the pressure isnt super high inside the can and the suppressor setting on the gas block doesnt do much. I leave it on "normal" and get no gas back in the action. Typical piston setup as far as clean inside the receiver.
Usually just lighter and shorter, if comparing from the same series.Sometimes I wonder why people by 223 specific cans.