Get the lightest can that met your needs. For me, that is the YHM Turbo K (or some newer 5.56 dedicated like Energetic ARX).
There is no AR-15 in 5.56 that is hearing safe. Why hang an anchor off your 10.3" to save 3-5db, when you should wear plugs/muffs anyhow? I am stuck with an original Trek, at 18oz, and its works ok. I just wish the Trek was about 8-10oz lighter.
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